Noah Webster's Dictionary 1. (adv.) In a subtle manner; slyly; artfully; cunningly. 2. (adv.) Nicely; delicately. 3. (adv.) Deceitfully; delusively.

Multi-Version Concordance Subtly (3 Occurrences) 1 Samuel 23:22 Please go make yet more sure, and know and see his place where his haunt is, and who has seen him there; for it is told me that he deals very subtly. (WEB JPS ASV) Psalms 105:25 He turned their heart to hate his people, To deal subtly with his servants. (ASV) Jeremiah 9:4 Take ye heed every one of his neighbor, and trust ye not in any brother; for every brother will utterly supplant, and every neighbor will go about with slanders. (See JPS)