-bas-

(basement,base,bass)

Low

-cap, capt-

(capture,capable,captain)

Take, seize

-cred-

(credible,credit,sacred)

Believe 

-dict-

(Predict, dictionary, dictate)

Speak

-duc,duct-

(induce, conduct, conductor)

Lead

-fac,fact-

(artifact, facsimile,facs)

make,do

-graph-

(autograph, graphic, biography)

write

-log-

(dialog, biology, prologue)

word, study of

-mort-

(mortal,mortician, mortifying)

die,death 

-scrib,script-

(transcribe, subscription, scribe)

write

-spec, spect-

(specimen,aspect, spectacle)

See

-tact-

(contact, tactile, tactic)

Touch

-ten-

(tenacious, retentive,tense)

Hold

-therm-

(thermostat, thermometer, thermosphere)

heat

-ver-

(verify, very)

true