서다

About, concerning.

Concerning or regarding a particular subject; about.

An approximate amount or degree.

on top of

Being unconditional, unlimited, or not relative to anything else. It describes something that is certain, total, or supreme without comparison.

Never, absolutely not.

To be accidental or coincidental; happening by chance.

By chance, accidentally, or unexpectedly. Often used in TOEFL listening narratives or history passages about accidental discoveries.

To take (a person); to pick up.

Along, according to.