flu (fluid), flux (influx)

to flow

 aud (audio), son (sonar), phon (telephone)

sound, to hear

tact (contact), tang (entangle), tag (contagious), tig (contiguous)

touch

.

clud (exclude), clus (cluster), claus (claustrophobia)

to close

 spond (correspond), sponse (sponsor), spous (spouse)

promise, answer for, pledge

pot (depot), pos (possess),

val (valor)

power, to be strong

cit (citadel), civ (civil), poli (police), polis (metropolis), polit (politics)

citizen, city, state

fac (factor), fic (fickle), fect (infect), fict (fictive)

make, do

mim (mimic), sembl (ensemble), simil (simile), simul (simulate)

copy, imitate, make like, together

ord (orderly)

order

men (omen), min (remind), mon (summon)

to think, remind, advise, warn

cred (credence), fid (affidavit)

believe, trust

pass (compassion), path (apathy), pat (pathos)

feeling, emotion, suffering

dur (duress), firm (affirm)

to harden, hold out, last, make, firm, stregthen