(noun, adjective): something contained, held; satisfied

con (with) + tent (keep)

I can't tell what the content of this can is until I open it.

(adjective): holding or sticking to something

ten (to hold) + ac + ious (adj. relating to)

Kareem is tenacious and he will stick with a subject until he understands it.

(verb): to kill off, to get rid of

ex (out of) + term (end) + in (in) + ate (verb cause to be)

The Schaeffer's hired a company to exterminate the cockroaches. 

(adjective): relating to an end

term (end) + in (in place of) + al (adj. quality)

Kim’s diagnosis of a terminal disease gives her only six months to live.

(noun): area of land

territ (earth) + ory

This area is considered to be Canadian territory.

(noun): the physical features of an area

terr (earth) + ain

There is some very rough terrain in the White Mountain area of New Hampshire.

(verb): to provide proof, to say something is true

at (to) + test (witness)

Malcolm can attest to Shiela's honesty since he has known her for ten years.

(verb): to make a statement based on personal knowledge

test (witness) + ify (verb. cause)

The witness testified at the trial.

(noun) a device for measuring heat

thermo (heat) + meter

I took my temperature with a thermometer.

(adjective): relating to the presence of heat

therm (heat) + al (adj. relation)

Lisa bought some thermal underwear to take with her when she goes skiing.

(noun, verb): agony, pain; to cause recurring pain

tor (twist) + ment (noun. condition)

The torment Jean's nightmares caused made him lose sleep.

The guards tormented the prisoners.

(noun): twisting of a body or an organ by an external force

tors (twist) + ion (noun. action)

The torsion of the bolt will help release the wheel.