不辞劳苦

to spare no effort

no; not so / (bound form) not; un-

old variant of 辭|辞[ci2]

to resign / to dismiss / to decline / to take leave / ballad (archaic poetic genre) / variant of 詞|词[ci2]

to toil / labor / laborer / to put sb to trouble (of doing sth) / meritorious deed / to console (Taiwan pr. [lao4] for this sense)

to toil / hard work

bitter / hardship / pain / to suffer / to bring suffering to / painstakingly