He is a tremendous person

He is a tremendous eater

to trespass upon someone’s patience/time

Trespassers will be prosecuted!

trial and error

trial balloon

trial run

to go on trial

triangle

triangular

in a trice

to trick someone

trick

Trick or treat!

tricky subject

He tried to palm it off on me

We tried very hard.

He tried to get the better of me but he failed

I tried to tell you gently.

tried and tested/tried and true

I tried to do it but failed, and lost money into the bargain

He tried to save his bacon

We tried other means.

He tried to prove that black is white

I’ve tried to convince them, but it’s no go