-ακός

See also: -άκος, ἄκος, and Appendix:Variations of "akos"

Ancient Greek[edit]

From -κός (-kós) with an added α from ā-stems and later extended to other nouns. Cognate with Proto-Celtic *-ākos (whence Old Irish -ach and Welsh -og) and Proto-Germanic *-agaz (whence Old Norse -agr and Gothic -𐌰𐌲𐍃 (-ags)).

-ᾰκός • (-akós) m (feminine -ᾰκή, neuter -ᾰκόν); first/second declension

Added to noun stems to form adjectives: of or pertaining to, in the manner of; -ac
‎καρδίᾱ (kardíā) + ‎-ακός (-akós) → ‎καρδιακός (kardiakós)

‎Αἰγύπτιος (Aigúptios) + ‎-ακός (-akós) → ‎Αἰγυπτιακός (Aiguptiakós)

First and second declension of -ᾰκός; -ᾰκή; -ᾰκόν (Attic)

Number	Singular			Dual			Plural
Case/Gender	Masculine	Feminine	Neuter	Masculine	Feminine	Neuter	Masculine	Feminine	Neuter
Nominative	-ᾰκός -akós	-ᾰκή -akḗ	-ᾰκόν -akón	-ᾰκώ -akṓ	-ᾰκᾱ́ -akā́	-ᾰκώ -akṓ	-ᾰκοί -akoí	-ᾰκαί -akaí	-ᾰκᾰ́ -aká
Genitive	-ᾰκοῦ -akoû	-ᾰκῆς -akês	-ᾰκοῦ -akoû	-ᾰκοῖν -akoîn	-ᾰκαῖν -akaîn	-ᾰκοῖν -akoîn	-ᾰκῶν -akôn	-ᾰκῶν -akôn	-ᾰκῶν -akôn
Dative	-ᾰκῷ -akôi	-ᾰκῇ -akêi	-ᾰκῷ -akôi	-ᾰκοῖν -akoîn	-ᾰκαῖν -akaîn	-ᾰκοῖν -akoîn	-ᾰκοῖς -akoîs	-ᾰκαῖς -akaîs	-ᾰκοῖς -akoîs
Accusative	-ᾰκόν -akón	-ᾰκήν -akḗn	-ᾰκόν -akón	-ᾰκώ -akṓ	-ᾰκᾱ́ -akā́	-ᾰκώ -akṓ	-ᾰκούς -akoús	-ᾰκᾱ́ς -akā́s	-ᾰκᾰ́ -aká
Vocative	-ᾰκέ -aké	-ᾰκή -akḗ	-ᾰκόν -akón	-ᾰκώ -akṓ	-ᾰκᾱ́ -akā́	-ᾰκώ -akṓ	-ᾰκοί -akoí	-ᾰκαί -akaí	-ᾰκᾰ́ -aká
Derived forms	Adverb			Comparative			Superlative
Derived forms	-ᾰκῶς -akôs			-ᾰκώτερος -akṓteros			-ᾰκώτᾰτος -akṓtatos
Notes:	This table gives Attic inflectional endings. For declension in other dialects, see Appendix:Ancient Greek dialectal declension.