-гіз

• -ғыз (-ğyz), -кіз (-kız), -қыз (-qyz)

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Cognate to Kyrgyz -гиз (-giz) / -киз (-kiz), Southern Altai -гис (-gis) / -кис (-kis) / -ис (-is), etc.

-гіз • (-gız)

1. Used to form causative verbs.

   Synonyms: -іт (-ıt), -гіз (-gız), -із (-ız), -тір (-tır), -дір (-dır)

• All causative suffixes are synonymous and carry the same meaning, but the usage is irregular and it's not possible to know which one should be used. The only rule is that -т (-t) is always used after a vowel. Often verbs may have a few synonymous causatives formed by different suffixes:

  жаз- (jaz-, “to write”) + -ғыз (-ğyz) > жазғыз- (jazğyz-, “to make someone write”)

  жаз- (jaz-, “to write”) + -дыр (-dyr) > жаздыр- (jazdyr-, “to make someone write”)

• And it is also possible to attach multiple suffixes, either forming a new meaning or just keeping the same one:

  оқы- (oqy-, “to read”) + -т (-t) + -қыз (-qyz) > оқытқыз- (oqytqyz-, “to make someone read”)

  өл- (öl-, “to die”) + -тір (-tır) > өлтір- (öltır-, “to kill”) + -т (-t) > өлтірт- (öltırt-, “to make someone kill”)