imiş

From i- +‎ -miş.

imiş

1. subject past participle of *imək (“to be”)

imiş

1. third-person singular present perfect of *imək (“to be”)

From Turkish *imek (“to be (auxiliary verb)”) +‎ -miş, ultimately from Proto-Turkic *ermiĺ.

imiş

1. was, were (auxiliary verb of a type of past tense)

It is used only in nouns. Sometimes it can be combined with the word before it, and if combined, the letter i is dropped. If the word before it ends with a vowel sound, the i is replaced by a consonant y. For example:

• öyle (“like that”) +‎ -imiş = öyleymiş (“(I guess) he/she/it was like that or (I heard that) he/she/it is/was like that”) or öyle (“like that”) +‎ -imiş = öyle imiş (“(I guess) he/she/it was like that or (I heard that) he/she/it is/was like that”).
• çocuk (“child”) +‎ -imiş = çocukmuş (“(I guess) he/she/it was a child or (I heard that) he/she/it is/was a child”) or çocuk imiş (“(I guess) he/she/it was a child or (I heard that) he/she/it is/was a child”).