tried and tested
Synonym of tried and true.
ADJ.
all, excited, hard
He tried hard to finish his homework before dinner.
VERB + TRIED
time, times
I tried three times to call her before she finally answered.
TRIED + NOUN
cajole, everything, hours
She tried everything to get the stain out of the carpet before the guests arrived.
ADV.
again
She tried again to fix the leaky kitchen faucet before calling a plumber.