to get tired of, to tire of, to lose interest in...

weariness, fatigue, languor...

to get tired of (doing), to lose interest in

to get tired of, to tire of, to lose interest in...

weariness

extreme fatigue

to tire of, to lose interest in, to be too much for one...

physical weariness, sense of fatigue, washed-out feeling

stage of ennui (esp. in one's married life), period of lassitude, lethargic period...

to grow weary, to get tired of

tirelessly, perseveringly, without letting up

to be at a loss how to continue an offensive, to be frustrated by impregnable defences

to tire of waiting

tirelessly, perseveringly, without letting up

tirelessly, perseveringly, without letting up

to be at a loss, to rack one's brains in vain, to think and think but get nowhere...

to be at a loss how to continue an offensive, to be frustrated by impregnable defences

to rack one's brains without getting anywhere, to mull over endlessly, to be unable to make up one's mind

to give up searching (for someone or something)

to give up searching (for someone or something)