What is the meaning of Tsi?

ISO 639-2 & ISO 639-3 language code for Tsimshian.

what

arm

standard spelling of chi

I (first-person singular pronoun)

to say

to

to say

used in dab tsi (“what”)

water (including in the form of a river or rain)

extinguish

hang

suspend

The katakana syllable ツィ (tsi) in Hepburn romanization.

Source: wiktionary.org