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acoustic

adjective

/əˈkuːstɪk/

Meaning

relating to sound or the sense of hearing; not amplified by electrical means

We recorded an acoustic version of the song in a quiet room.

auditory, aural, sonic, non-electric, unplugged

electric, electronic, amplified

acoustic guitar, acoustic treatment, acoustic panel, acoustic properties, acoustic performance

Having or showing no pity or compassion for others.

Unreasonably high in price or amount.

Working in a well-organized way; competent and effective in performance.

relating to sexual intercourse or sexually transmitted diseases

failing to persuade or impress; not believable or credible

exercising power in a cruel or arbitrary way