1. 费体力的工作：Elbe 易北河 | elbow grease 费体力的工作 | elbow 肘

2. 可施展之地：nose dive 一落千丈 | elbow grease 可施展之地 | chin music 聊天

3. 费体力的工作,重活：(5)give someone the cold shoulder 冷淡某人 | (7)elbow grease 费体力的工作,重活 | (8)twiddle one's fingers 闲着无事

4. 费劲的体力活,(尤指)擦拭：double check 复查,仔细检查 | elbow grease 费劲的体力活,(尤指)擦拭 | get (something) off the ground 开始或从事某工作,在某方面取得进展

noun

1. use of physical or mental energy
hard work

e.g. he got an A for effort
they managed only with great exertion

Synonym: effortexertiontravailsweat