-tsu

-tsu

1. Used to create adjectives from nouns.

   ‎eguzki (“sun”) + ‎-tsu → ‎eguzkitsu (“sunny”)

   ‎euri (“rain”) + ‎-tsu → ‎euritsu (“rainy”)

As with many slang suffixes, there are probably multiple origins. The main origin is probably -tsa +‎ -u, but another origin may be -su added to stems ending in t.

-tsu (front vowel harmony variant -tsy, linguistic notation -tsU)

1. (slang) Slang suffix, generally for nouns (with clipping).
2. (no longer productive) Found in some surnames.

-tsu

1. Rōmaji transcription of つ