IPA: /ˈsniːkiər/
KK: /ˈsniːkiər/
More secretive or stealthy than someone or something else, often in a way that is not honest or fair.
He took a sneakier approach to avoid getting caught.
Comparative: sneakier
Superlative: sneakiest
Sneakier → It is formed from "sneak" (of uncertain origin, possibly from Middle Dutch "snecken", meaning to creep or move stealthily) and the comparative suffix "-ier" (meaning more). The word "sneakier" means more stealthy or more inclined to sneak.
Think of someone who is 'creeping' or 'moving stealthily' — that's what 'sneakier' means, as it describes someone who is more inclined to sneak.