bi-

See also: Appendix:Variations of "bi"

English

Etymology

From Latin bis ‎(“twice”).

Prefix

Latin number prefix
Previous:	uni-
Next:	tri-

bi-

1. two
2. (chemistry, proscribed) half

Usage notes

In an old, common method used to indicate the presence of an acidic hydrogen, sodium hydrogen sulfate is called "sodium bisulfate" and sodium hydrogen carbonate is called "sodium bicarbonate". This method is not recommended by IUPAC and does not denote a “doubling up” of a specific group, which is reserved for the Greek prefix di-, as in carbon dioxide ‎(“CO₂”).

The prefix bi in the older system comes from the observation that there is two times as much carbonate (CO₃) in sodium bicarbonate (NaHCO₃) and other bicarbonates as in sodium carbonate (Na₂CO₃) and other carbonates.

Synonyms

• di-
• duo-

Derived terms

► English words prefixed with bi-

terms derived from bi-

bi biannual biautomaton biceps bichrome bicolor biconvex bicornuate bicycle bicyclic bicylindrical bidentate bidirectional

biennial bifacial bifocals bijugate bilabial bilabiate bilanguage bilateral bilinear bilingual billion bilobate

bilogarithmic bilogarithmical bimanual bimester bimetal bimonthly binary binomial biped bipod biplane bipolar bireme

birefringent birotate biscuit bisect bisection bisector biserrate bisexual bisexuality bitartrate bivalve biweekly

Translations

two-

• Chinese:

  Mandarin: 雙 (zh), 双 (zh) ‎(shuāng)

• Dutch: bi-, twee-, dubbel-
• French: bi- (fr)
• Galician: bi- (gl)
• German: bi- (de), zwei- (de)
• Ido: bi-
• Irish: dé-
• Italian: bi- (it)

• Japanese: 双 (ja) ‎(そう, sō)
• Malay: dwi- (ms), bi-
• Manx: daa-
• Portuguese: bi- (pt)
• Punjabi: ਦੁ- ‎(du-)
• Russian: двух- ‎(dvux-), дву- ‎(dvu-), би- (ru) ‎(bi-)
• Spanish: bi-, bis- biz-
• Swedish: bi- (sv)

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Danish

Pronunciation

• IPA^(key): /bi/, [ˈb̥i]

Etymology 1

From German bei- ‎(“by-”).

Prefix

bi-

1. by-, side-

Synonyms

• side-

Etymology 2

From Latin bis ‎(“twice”).

Prefix

bi-

1. bi-

Synonyms

• di-
• tve-
• dobbelt-

See also

► Danish words prefixed with bi-

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French

Etymology

From Latin bis ‎(“twice”).

Prefix

bi-

1. bi-

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Gothic

Romanization

bi-

1. Romanization of 𐌱𐌹-

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Ido

Prefix

bi-

1. bi-

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Italian

Etymology

From Latin bis ‎(“twice”).

Prefix

bi-

1. bi-
2. di-

See also

• Category:Italian words prefixed with bi-

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Latin

Etymology

A shortened form of bis ‎(“twice”), which drops its final s when when making compositions.

Pronunciation

• (Classical) IPA^(key): /bi/, [bɪ]

Prefix

bi-

1. having two parts
2. occurring twice

Derived terms

► Latin words prefixed with bi-

References

• bi- in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• “bi-” on page 231/3 of the Oxford Latin Dictionary (1st ed., 1968–82)

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Navajo

Prefix

bi-

1. his, her, its, their

Usage notes

This prefix often corresponds to an English possessive ’s appended to the preceding word. For example, Diné bizaad means literally “the People their-language”, equivalent to “the People’s language” (i.e., Navajo language).

Related terms

b- bá baa be- bí

bí- bíʼáłtsé bibaʼ biiʼ

bííʼ biyiʼ daabí tʼáá bí

See also

Navajo possessive pronouns

			singular	dual	plural
1st person			shi-	nihi-	danihi-
2nd person			ni-	nihi-	danihi-
3rd person			bi-
4th person (3o)			yi-
4th person (3a)			ha-, hw-
Indefinite person (3i)			a-

• á-
• ał-
• ahił-

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Old English

Alternative forms

• biġ-, be-

Etymology

From bī ‎(“by, near, around”).

Prefix

bī-

1. prefix meaning near, around (compare Latin para-), occurring primarily in nouns

   bīgenga ‎(“inhabitant; observer; benefactor”)

   bīnama ‎(“pronoun”)

   bīleofa ‎(“support, sustenance, nourishment, capital”)

   bīswæc ‎(“treachery”)

   bīword ‎(“proverb, byword”)

Descendants

• English by-

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Old Saxon

Etymology 1

An unstressed form of bī, from Proto-Germanic *bi-.

Prefix

bi-

1. A productive prefix usually used to form verbs and adjectives, especially verbs with the sense “around, throughout” or makes transitive verbs from intransitive verbs, adjectives and nouns.

   bibrekan ‎(“to break”)

   bibrengian ‎(“to accomplish”)

   bidēlian ‎(“to deprive”)

   bidelvan ‎(“to bury”)

   bidempian ‎(“to suffocate”)

   bidernian ‎(“to conceal, to hide”)

   bidōdian ‎(“to kill”)

   bidriogan ‎(“to deceive”)

   bidrōragon ‎(“to bleed to death”)

   bidumbilian ‎(“to make a fool”)

   bidwellian ‎(“to hinder”)

   bifāhan ‎(“to embrace, seize”)

   bifallan ‎(“to befall”)

   bifelhan ‎(“to recommend, give over, confide”)

   bifellian ‎(“to throw down”)

   bifindan ‎(“to notice, find out”)

   bigān, bigangan ‎(“to celebrate”)

   bigehan ‎(“to dare, confess”)

Derived terms

► Old Saxon words prefixed with bi-

Etymology 2

From bī ‎(“by, near, around”).

Prefix

bī-

1. prefix meaning near, around (compare Latin para-), occurring primarily in nouns

   bīgengio ‎(“inhabitant”)

   bīword ‎(“proverb, byword”)

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Portuguese

Prefix

bi-

1. bi- (two-)

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Spanish

Alternative forms

• bis-
• biz-

Etymology

From Latin bis ‎(“twice”).

Prefix

bi-

1. bi-

Derived terms

• bicorne
• bimensual
• bicicleta
• bilingüe
• bisemenal

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Swedish

Pronunciation

• IPA^(key): /bi/, [ˈb̥i]

Prefix

bi-

1. by-, next to, near, by the side, aside; same as English by- and German bei-; see also the rare preposition bi
2. bi-, two, dual; from Latin bis ‎(“twice”)

Derived terms

► Swedish words prefixed with bi-