Observation
tshitimu s/he is lazy nitshitimin I am lazy
shikatshu s/he is cold apu shikatshit s/he is not cold

The verbs above have short i stems that disappear when the -u of the 3rd person Independent Indicative Present (the dictionary form) is added. But other forms reveal the i, for example the first person form nitshitimin or the conjunct shikatshit used after the negative particle apu.

EXAMPLES OF AI VERBS WITH SHORT i STEMS
pushu s/he gets on board pushi! get on board!
maushu s/he picks berries tshimaushin you pick berries
innishu s/he is intelligent tshitinnishinau you (pl) are intelligent
mitshu s/he eats it tshimitshinan we eat it
kushtatshu s/he is afraid nikushtatshinan we are afraid
tshimutu s/he cheats eka tshimuti! don’t cheat!
kuashkutu s/he jumps kuashkutitau! let’s jump!
apu s/he sits apipan s/he was sitting
kushpu s/he goes to the country nikushpinan we go to the country
aimu s/he speaks aimi! speak!
tshitimu s/he is lazy nitshitimiti I was lazy

Short i stem verbs can easily be confused with short u stems, because the short vowels are not pronounced [i] or [u], but often as [ǝ]The sound [ǝ] is pronounced like the e in English problem.. The spelling of the verb forms for these stems requires some learning where short u is not pronounced. For example, pushu s/he gets on board gives nipushin I get on board, pronounced [nǝpu∫ǝn]), which means it’s a short i stem.

All verb stems are indicated in the dictionary.