IPA: /ˈfeɪntər/
KK: /feɪntər/
Less strong or less bright than something else; having a weak or dim quality.
The sound of her voice became fainter as she walked away.
Comparative: fainter
Superlative: faintest
Fainter → It is formed from "faint" (from Old French *feint*, meaning feigned or not strong) and the suffix "-er" (meaning one who). The word "fainter" refers to one who is weaker or less strong, often in terms of light or presence.
Think of someone who is 'feigning' strength or presence, which makes them 'weaker' — that's why fainter means less strong or less intense.