immaculate

Concise Oxford English Dictionary © 2008 Oxford University Press:
immaculate/ɪˈmakjələt/

▶adjective

• 1 perfectly clean, neat, or tidy.

• 2 free from flaws or mistakes.

  ■ Catholic Theology free from sin.

• 3 Botany & Zoology uniformly coloured without spots or other marks.

– derivatives
immaculacy noun,
immaculately adverb,
immaculateness noun.

– origin ME: from L. immaculatus, from in- ‘not’ + maculatus ‘stained’.