-τύς

Ancient Greek

From Proto-Indo-European *-tus (suffix deriving action nouns from verb roots). Cognate with Latin -tus, as in habitus (“demeanor”).

-τῡ́ς • (-tū́s) m (genitive -τῠ́ος); third declension

Third declension of ὁ -τῡ́ς; τοῦ -τῠ́ος (Attic)

Case / #	Singular	Dual	Plural
Nominative	ὁ -τῡ́ς ho -tū́s	τὼ -τῠ́ε tṑ -tŭ́e	οἱ -τῠ́ες hoi -tŭ́es
Genitive	τοῦ -τῠ́ος toû -tŭ́os	τοῖν -τῠ́οιν toîn -tŭ́oin	τῶν -τῠ́ων tôn -tŭ́ōn
Dative	τῷ -τῠ́ῐ̈ tōî -tŭ́ĭ̈	τοῖν -τῠ́οιν toîn -tŭ́oin	τοῖς -τῠ́σῐ / -τῠ́σῐν toîs -tŭ́sĭ(n)
Accusative	τὸν -τῡ́ν tòn -tū́n	τὼ -τῠ́ε tṑ -tŭ́e	τοὺς -τῦς / -τῠ́ᾰς toùs -tûs / -tŭ́ăs
Vocative	-τῡ́ -tū́	-τῠ́ε -tŭ́e	-τῠ́ες -tŭ́es
Notes:	This table gives Attic inflectional endings. For declension in other dialects, see Appendix:Ancient Greek dialectal declension.

Ancient Greek terms suffixed with -τύς

Smyth, Herbert Weir (1920), “Part III: Formation of Words”, in A Greek grammar for colleges, Cambridge: American Book Company, § 840.4