unadulterated

Từ điển American Heritage Dictionary 4th

un·a·dul·ter·at·ed (ŭn'ə-dŭlʹtə-rā'tĭd)adj.
1. Not mingled or diluted with extraneous matter; pure. See Synonyms at pure.
2. Out-and-out; utter:
the unadulterated truth.