is-

See also: Appendix:Variations of "is"

English

Prefix

is-

1. Alternative form of iso-, before a vowel.

Derived terms

English terms prefixed with is-

isentropic

isethionic acid

isethionate

Further reading

• “is-”, in Collins English Dictionary.

• “is-”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.

• “is-”, in OneLook Dictionary Search.

Anagrams

• s͞i, Si., S. I., SI, S.I., si, Si

Choctaw

Prefix

is- (except before s ish-, class I second-person singular)

1. the subject of an active transitive verb

   you, thou

2. the subject of an intransitive active verb

   you, thou

3. the subject of a negative imperative verb

   Issakopōlinna!

   Don't bite me!

Inflection

Choctaw Person Markers

			class I			class II		class III		class N		imperative
			+s	+C	+V	+C/i	+a/o	+C	+V	+C	+V	+C	+V
first-person	singular	initial	-li			sa-	si-	a̱-	am-	ak-		n/a
		medial						-sa-	-sam-
	paucal		ī-		il-	pi-		pi̱-	pim-	kī-	kil-
	plural					hapi-		hapi̱-	hapim-
second-person	singular		is-	ish-		chi-		chi̱-	chim-	chik-		∅
	plural		has-	hash-		hachi-		hachi̱-	hachim-	hachik-		ho-	oh-
third-person			∅			∅		i̱-	im-	ik-

Cornish

Etymology

From Proto-Brythonic *is, from Proto-Celtic *ɸīssu. Related to a-is (“below, lower”) and isel (“low”). Compare Welsh is-

Prefix

is-

1. sub-, infra-, lower, under

   ‎is- + ‎kevresek (“sequential”) → ‎iskevresek (“subsequent”)

   ‎is- + ‎poynt (“point”) → ‎ispoynt (“minimum”)

   ‎is- + ‎rudh (“red”) → ‎isrudh (“infrared”)

2. vice, deputy

   ‎is- + ‎breusydh (“referee”) → ‎isbreusydh (“assistant referee”)

   ‎is- + ‎lewydh (“president”) → ‎islewydh (“vice-president”)

Derived terms

Cornish terms prefixed with is-

iskarga

islinenna

isrudh

istitla

French

Prefix

is-

1. alternative form of iso-, before a vowel

Derived terms

Category French terms prefixed with is- not found

• isenthalpe
• isentropique

Maltese

Pronunciation

• IPA^(key): /ɪs/

Article

is-

1. alternative form of il-

Usage notes

• Used before the letter s. For details on usage, see the main lemma.

Welsh

Etymology

See is. Cognate with Cornish is-.

Pronunciation

• IPA^(key): /ˌiːs/, /ɪs/

Prefix

is-

1. lower, deputy, lieutenant, sub-, vice-, under-, by-

   Antonym: uwch-

   ‎is- + ‎arlywydd (“president”) → ‎is-arlywydd (“vice-president”)

   ‎is- + ‎deddf (“law”) → ‎is-ddeddf (“by-law”)

   ‎is- + ‎gorsaf (“station”) → ‎isorsaf (“substation”)

   ‎is- + ‎rhywogaeth (“species”) → ‎isrywogaeth (“subspecies”)

   ‎is- + ‎teitl (“title”) → ‎isteitl (“subtitle”)

Usage notes

• Triggers the soft mutation on the noun following.

Derived terms

Welsh terms prefixed with is-

is-alpaidd

is-arlywydd

isatomig

isfeirniadaeth

isfyd

is-ganghellor

isgasgliad

isddatgymalu

is-ddeddf

is-etholiad

isetholiad

isorsaf

isradd

islawr

islygadol

is-lywydd

isbaragraff

isbrisio

isbwerdy

isrannu

isrywogaeth

is-set

isteitl

isdyfiant

istyfiant

Mutation

Mutated forms of is-

radical	soft	nasal	h-prothesis
is-	unchanged	unchanged	his-

Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.

References

• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “is-”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies