1. Not encumbered with a physical burden or load
   - burdenless, unburdened

See also: unencumbered

• acoustic phenomenon
• acoustic power
• acoustic projection
• acoustic radiation pressure
• acoustic reactance
• acoustic resistance
• acoustic spectrum
• acoustic storage
• acoustic wave
• acoustical
• acoustically
• acoustician
• acousticophobia
• acoustics
• acquaint
• acquaintance
• acquaintanceship
• acquainted
• acquiesce
• acquiescence
• acquiescent
• acquiescently
• acquirable
• acquire
• acquired