Subtle is a word I love

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subtle
ˈsʌt(ə)l/
adjective
adjective: subtle; comparative adjective: subtler; superlative adjective: subtlest
  1. 1.
    (especially of a change or distinction) so delicate or precise as to be difficult to analyse or describe.
    “his language expresses rich and subtle meanings”
    antonyms: crude
  2. 2.
    making use of clever and indirect methods to achieve something.
    “he tried a more subtle approach”
  3. 3.
    archaic
    crafty; cunning.
    “the subtle fiend dissembled”
    synonyms: ingenious, clever, skilful, adroit, cunning, crafty, wily, artful, devious

    “the plan was simple yet subtle”
    antonyms: crude, artless
Origin
Middle English (also in the sense ‘not easily understood’): from Old French sotil, from Latin subtilis .