fast

1. rianrang tein; e.g. His car will not go fast = A mawttawka khulrang in a kal kho lo;
2. fek tein; e.g. Hold fast to my hand = Ka kut fek tein i tlaih;
3. thinthi in; e.g. He is fast asleep = Thinthi in aa hngilh.

fatally

thihnak tiang phan in

favorably

U.S.  hnatlakpi ngaiin.

fiercely

ttihnung ngaiin

finally

a donghnak ah

first

1. hawi hlan ah; e.g. He always arrives first = Hawi hlan ah a phan hmasa zungzal;
2. deuh; e.g. I will not pay the money. I will go to jail first = Tangka ka pe lai lo, thong ah tla hmasa deuh lo ning.

forever

zungzal

formerly

hlan ah cun

forth

hmailei ah