1.
perfect, flawless, complete
Having no flaws or defects; ideal in every way.
完璧 means perfect or flawless.
USAGE:
- 完璧な + noun: a perfect ~
- 完璧に + verb: perfectly
- 完璧だ: is perfect
NOTE: The kanji 璧 means "jewel" - the word originally referred to a flawless jade disc.