of no use, having no connection

to have no concern, have no business, useless

having nothing to do (with)

allow no respite

let no one know, keep hidden

give or make no sign, make away without telling, keep one's own counsel

be unaware (of), not know at all, take no action

be unable to hear due to din

to do work in time, do not miss the time

protect from injury

forget all about, be disgusted (with), Show no signs of something

not letting a chance go

keep hidden, not to expose at all, not allow to leak out

unconcerned, having nothing to do (with)

be pitch-dark

say yes or no, give categorical reply, give clear answer