「On」と「Upon」を使用した句動詞 - アクションの実行（時）

to have confidence that someone will fulfill one's wishes or requests

頼る

to depend on something for a particular outcome

依存する

to make a brief reference to a particular topic in the course of discussing something broader

簡単に触れる

to make a choice or reach a conclusion after careful consideration

決定する

to take advantage of someone's feelings, fears, or weaknesses

利用する

to dedicate time and effort to produce or fix something

に取り組む

to encounter someone or something unexpectedly

出会う

to encounter suddenly or unexpectedly

偶然出会う

to suddenly have a great idea

突然ひらめく