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subtler
Adjectivesubtle has 4 senses
elusive, subtle - be difficult to detect or grasp by the mind; "his whole attitude had undergone a subtle change"; "a subtle difference"; "that elusive thing the soul" Antonyms:palpable, tangible (indirect, via impalpable)
insidious, pernicious, subtle - working or spreading in a hidden and usually injurious way; "glaucoma is an insidious disease"; "a subtle poison" Antonym:harmless (indirect, via harmful)