useful

use*ful

adjective

{bc}capable of being put to use

useful idiot

noun

{bc}a naive or credulous person who can be manipulated or exploited to advance a cause or political agenda

useful life

noun

{bc}the amount of time during which something is in good enough condition to be used

come in useful

idiom

{bc}to be useful

make oneself useful

idiom

{bc}to do something helpful

prove (to be) useful

idiom

{bc}to be eventually found to be helpful

come in handy

idiom

{bc}to turn out to be useful when needed