-τός - Wikiwand

-τός • (-tós) m (feminine -τή, neuter -τόν); first/second declension

creates verbal adjectives of possibility, either active or passive
‎δύναμαι (dúnamai, “can”) + ‎-τός (-tós) → ‎δυνατός (dunatós, “able (active), doable (passive)”)

‎διαλῡ́ω (dialū́ō, “dissolve”) + ‎-τός (-tós) → ‎διαλυτός (dialutós, “dissoluble”)
Forms ordinal and fractional numerals
‎τεσσαράκοντα (tessarákonta, “forty”) + ‎-τός (-tós) → ‎τεσσαρακοστός (tessarakostós, “fortieth”)

More information Number, Singular ...

Number		Singular		Dual		Plural
Case/Gender		Masculine	Feminine	Neuter		Masculine	Feminine	Neuter	Masculine	Feminine	Neuter
Nominative		-τός -tós	-τή -tḗ	-τόν -tón		-τώ -tṓ	-τᾱ́ -tā́	-τώ -tṓ	-τοί -toí	-ταί -taí	-τᾰ́ -tắ
Genitive		-τοῦ -toû	-τῆς -tês	-τοῦ -toû		-τοῖν -toîn	-ταῖν -taîn	-τοῖν -toîn	-τῶν -tôn	-τῶν -tôn	-τῶν -tôn
Dative		-τῷ -tōî	-τῇ -tēî	-τῷ -tōî		-τοῖν -toîn	-ταῖν -taîn	-τοῖν -toîn	-τοῖς -toîs	-ταῖς -taîs	-τοῖς -toîs
Accusative		-τόν -tón	-τήν -tḗn	-τόν -tón		-τώ -tṓ	-τᾱ́ -tā́	-τώ -tṓ	-τούς -toús	-τᾱ́ς -tā́s	-τᾰ́ -tắ
Vocative		-τέ -té	-τή -tḗ	-τόν -tón		-τώ -tṓ	-τᾱ́ -tā́	-τώ -tṓ	-τοί -toí	-ταί -taí	-τᾰ́ -tắ
Derived forms		Adverb		Comparative		Superlative
	-τῶς -tôs		-τότερος -tóteros		-τότᾰτος -tótătos
Notes:		This table gives Attic inflectional endings. For declension in other dialects, see Appendix:Ancient Greek dialectal declension.