DEVILISH, adjective 1. Partaking of the qualities of the devil; diabolical; very evil and mischievous; malicious; as a devilish scheme; devilish wickedness. 2. Having communication with the devil; pertaining to the devil. 3. Excessive; enormous; in a vulgar and ludicrous sense; as a devilish cheat.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI