To Refuse, To Reject
transitive verb, godan verb
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means refuse and the verb vocab version is to refuse.
こばむ
What are you refusing? You are refusing a child, because children are all bad. You say "子 bad, 子 bad" over and over again.
私のかかりつけのお医者さんは、私が大腸癌検査を受けるのを拒みました。
My family doctor refused to let me get the colorectal cancer screening done.