To Push
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means push so the verb vocab version is to push.
おす
The reading is the one you learned with the kanji, actually!
すみません。今朝タイムカードを押し忘れちゃったんですが、どうすればいいですか？
I’m sorry, I forgot to punch my timecard this morning. What should I do?