qual- , quan-, quo

quantity

quantify

quantitative

quality

qualitative

qualify

qualifier

qualified

qualification

qualifying

quandry

quantum

quota

qu, wh -> generally means question

query

quest

question

unquestioned

questionable

unquestionably

questioner

questioning

questionnaire

request

cue

acquire

acquired

acquisition

conquer

conquering

conqueror

conquest

inquire

inquiry

inquisitive

require

required

requirement

requisite

prerequisite

perk

perquisite

perky

perch