Phrasal Verbs with 'Buckle'

Buckle down

Start working hard, apply yourself

Example: We had to BUCKLE DOWN and study for the exam.

Buckle under

Accept something under pressure, against your will

Example: They didn't like the ideas, but had to BUCKLE UNDER or face the sack.

Buckle up

Fasten a seatbelt

Example: We were told to BUCKLE UP before take-off.