于 yú ㄩˊ to go to take sentence-final interrogative particle yú ㄩˊ in at on of time or place (indicating any indirect relation) to toward vis-à-vis with regard to for from out of indicating a source than used in comparison (used in the passive voice) by Where 于 is used Example sentences and grammar articles using 于 Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0