1. renege on（約束などを破る、反故にする）
= The party reneged on its manifesto commitment.
2. bow out（身を引く、退く）
= He bowed out of international football last year.
3. clam up（口を閉ざす、黙り込む）
= He clammed up when I asked him about his past.
4. smooth over（丸く収める）
= We managed to smooth over the issue.
5. sound out（考えを探る、聞きだす）
= We should sound him out first.
6. blot out（覆い隠す、覆う）
= Thick clouds were blotting out the stars.
7. buy off（買収する、賄賂を贈る）
= They tried to buy off the witness.
8. goof off（サボる、怠ける）
= Stop goofing off and get back to work.