苦于

苦于	kǔ yú	to suffer from (a disadvantage)
苦	kǔ	bitter / hardship / pain / to suffer / to bring suffering to / painstakingly
于	Yú	surname Yu
于	yú	to go / to take / sentence-final interrogative particle / variant of 于
于	yú	(of time or place) in; at; on / (indicating any indirect relation) to; toward; vis-à-vis; with regard to; for / (indicating a source) from; out of / (used in comparison) than / (used in the passive voice) by