unaided
unai·ded
adjective
1.
2.
(of the eye or ear e.g.) without the aid of an optical or acoustical device or instrument
- “visible to the naked eye”
- “clearly audible to the unaided ear”
Origin
From un- + aided.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.