-ին

According to J̌ahukyan, from the Proto-Indo-European *-eno- suffix and partly perhaps from the *-ino- suffix, variants of *-no-.

-ին • (-in)

1. forming adjectives with the meaning of location

   ստորին ― storin ― lower

   առաջին ― aṙaǰin ― first

   արտաքին ― artakʿin ― external

2. forming adjectives

   լռին ― lṙin ― taciturn, silent

   ջերին ― ǰerin ― warm

3. forming adverbs

   ինքնին ― inkʿnin ― by himself/herself/itself

• J̌ahukyan, Geworg (1998), “-ին”, in Hin hayereni verǰacancʿneri cagumə [The Origin of Old Armenian Suffixes] (Hayocʿ lezvi hamematakan kʿerakanutʿyan harcʿer; 2) (in Armenian), Yerevan: Anania Širakacʿi, pages 5–48
• J̌ahukyan, Geworg (2010), “-ին¹”, in Vahan Sargsyan, editor, Hayeren stugabanakan baṙaran [Armenian Etymological Dictionary] (in Armenian), Yerevan: Asoghik, page 807a

According to J̌ahukyan, an Urartian origin can be supposed.

-ին • (-in)

1. forming adjectives

   դիւրին ― diwrin ― easy

   խրթին ― xrtʿin ― obscure, dark

   խորին ― xorin ― deep

   մթին ― mtʿin ― dark

• J̌ahukyan, Geworg (1998), “-ին”, in Hin hayereni verǰacancʿneri cagumə [The Origin of Old Armenian Suffixes] (Hayocʿ lezvi hamematakan kʿerakanutʿyan harcʿer; 2) (in Armenian), Yerevan: Anania Širakacʿi, pages 5–48
• J̌ahukyan, Geworg (2010), “-ին²”, in Vahan Sargsyan, editor, Hayeren stugabanakan baṙaran [Armenian Etymological Dictionary] (in Armenian), Yerevan: Asoghik, page 807a