bas-

basement, basic, bass

low

cap-, capt- 

capture, capable, captain

take, seize 

cred-

credible, incredible, credit

dict- 

predict, dictionary, contradict

duc-, duct-

induce, conduct, product

fac-, fact-

artifact, factor, factory

graph-

autograph, graphic, graphite, demographic, paragraph, geography

log-

logic, dialogue, biology

mort-

mortal, immortal, mortician

scrib-, script-

transcribe, subscription, scribble

spec-, spect-

specimen, aspect, spectacular

tact-

contact, tactile, tactic, intact, tactition

ten-

tenacious, retentive, often, tens place

therm-

thermometer, thermostat, thermal

ver-

verify, very, avert, veracity