으로서

As, in the capacity of

Marks the role someone is speaking or acting from: as a comedian, as an American, as someone who does this job, as a team. It also fits things — one line describes samgyetang in its capacity as a restorative dish. It is the form used after a consonant; after a vowel it is 로서. The trap is 로써 with a double consonant, which means 'by means of' — 으로서 is a role, 으로써 is a tool.

Register: slightly formal