Synonyms of be at pains in English:

be at pains

See definition of pain


1‘they were at pains to put him at ease’

try hard, make a great effort, make an effort, make every effort, spare no effort, take pains, take great pains, take care, put oneself out, apply oneself, exert oneself
strive, endeavour, try, struggle, battle, labour, toil, strain, work, aim
do one's best, do all one can, do one's utmost, give one's all, give it one's all, go all out
informal bend over backwards, fall over backwards, lean over backwards, give it one's best shot