-ый

• IPA^(key): [ɨj]

Borrowed from Old Church Slavonic -ыи (-yi), displaced expected -ой (-oj) in unstressed positions, from Proto-Slavic *-ъ + *jь,^[1] doublet of -о́й (-ój).

• -о́й (-ój)

-ый • (-yj) m

1. masculine nominative singular adjective ending
2. masculine inanimate accusative singular adjective ending

The same as Etymology 1.

• -ий (-ij)

-ый • (-yj)

1. -ed

   ‎одно- (odno-, “one”) + ‎глаз (glaz, “eye”) + ‎-ый (-yj) → ‎одногла́зый (odnoglázyj, “one-eyed”)

   ‎све́тлый (svétlyj, “light”) + ‎во́лос (vólos, “hair”) + ‎-ый (-yj) → ‎светловоло́сый (svetlovolósyj, “light-haired”)

   ‎без- (bez-, “without”) + ‎зуб (zub, “tooth”) + ‎-ый (-yj) → ‎беззу́бый (bezzúbyj, “toothless”, literally “no-toothed”)

• This suffix is used particularly with two-part compounds, where the second part normally refers to a body part.
• The stress is drawn onto the preceding syllable.
• These adjectives consistently have short forms of accent pattern a.
• The suffix has the variant -ий (-ij) used particularly after velars (к г х) due to Russian spelling rules.