To Puke, To Throw Up, To Spit
transitive verb, godan verb
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means throw up so the verb version is to throw up or to puke or to spit.
はく
The reading is from the reading you learned with the kanji. HA HA HA! Barf.
「遅れてごめんなさい。朝、少し気分が悪くて吐いてしまって。」「大丈夫だよ。遅れても来ないよりはましだよ。」
"I’m sorry I’m late. I was sick and threw up this morning." "It’s okay. Better late than never."