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