于(Preposition: with, using.) - Chinese Text Project Dictionary

于

yú ㄩˊ (6.6): Same as “於(3.6)” yú ㄩˊ: 介詞，相當於“以”、“用”。 Preposition: with, using.
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《尚書·盤庚上》:	予告汝于難，若射之有志。 Show complete text
《尚書·盤庚上》:	I have announced to you the difficulties (of the intended movement), being bent on it, like an archer (whose only thought is to hit).
《春秋左傳》:	欒武子曰：楚自克庸以來，其君無日不討國人而訓之于民生之不易，禍至之無日，戒懼之不可以怠。 Show complete text