What does "apply oneself" mean?

Synonym of strive: to work hard, to complete an activity with good effort and focus.

What is a synonym for "apply oneself"?

Common synonyms include: buckle, buckles, commit oneself, devote oneself, diligence, effort.

verb

verb ·Rare ·Advanced level

Verb

1
Synonym of strive: to work hard, to complete an activity with good effort and focus. idiomatic
"His parents wish he had applied himself better while he was in school, but he couldn't give a toss."

"His parents wish he had applied himself better while he was in school, but he couldn't give a toss."