undiluted (adj.)

• absolute
• bare
• clear
• naked
• neat
• perfect
• plain
• pure
• purified
• rectified
• sheer
• simple
• straight
• unadulterated
• unalloyed
• unblended
• uncombined
• uncompounded
• uncorrupted
• uncut
• unleavened
• unmingled
• unmitigated
• unmixed
• unqualified
• unsophisticated