subtle (adj.)
- abstruse
- accurate
- acute
- adulterated
- airy
- analytic
- analytical
- appreciative
- arcane
- arch
- artful
- astute
- attentive
- attenuate
- attenuated
- boyish
- cagey
- calculating
- canny
- casuistic
- chimerical
- civilized
- clever
- close
- complex
- complicated
- concealed
- confounded
- confused
- conscientious
- constant
- convoluted
- correct
- crabbed
- crafty
- creamy
- critical
- cultivated
- cultured
- cunning
- cut
- cute
- daedal
- dainty
- deceitful
- deceptive
- deep
- deep-laid
- delicate
- demanding
- designing
- detailed
- devious
- dexterous
- diaphanous
- differential
- dilute
- diluted
- diplomatic
- direct
- discriminate
- discriminating
- discriminative
- distinctive
- dreamlike
- elaborate
- elegant
- elusive
- entangled
- ethereal
- even
- exact
- exacting
- exigent
- express
- exquisite
- faint
- faithful
- fanciful
- fastidious
- fatuous
- feline
- fine
- finespun
- finical
- finicky
- flat
- flimsy
- foxy
- frail
- fussy
- gaseous
- gauzy
- girlish
- gossamer
- graceful
- gracile
- gracious
- guileful
- hairsplitting
- hidden
- illusory
- imaginary
- implicated
- inerrable
- inerrant
- infallible
- ingenious
- insidious
- insubstantial
- intricate
- inventive
- involved
- iridescent
- knotted
- knowing
- labyrinthian
- labyrinthine
- lacy
- light
- mathematical
- matted
- mazy
- meandering
- mellow
- meticulous
- microscopic
- minute
- misty
- multifarious
- nacreous
- narrow
- nebulous
- nice
- obscure
- opalescent
- pale
- papery
- particular
- pastel
- pawky
- pearly
- perplexed
- polished
- politic
- precise
- profound
- punctilious
- punctual
- quiet
- rare
- rarefied
- ratiocinative
- ready
- recondite
- refined
- religious
- remote
- resourceful
- rigid
- rigorous
- roundabout
- sad
- scheming
- scientific
- scrupulous
- selective
- sensitive
- serpentine
- severe
- shadowy
- sharp
- shifty
- shrewd
- simple
- skillful
- slender
- slick
- slight
- slim
- slimy
- slippery
- sly
- small
- smarmy
- smart
- smooth
- snaky
- snarled
- sneaky
- sober
- soft
- softened
- somber
- sophistical
- sophisticated
- spirituous
- square
- stealthy
- strategic
- strict
- subdued
- supple
- svelte
- sweet
- sylphlike
- tactful
- tactical
- tangled
- tender
- tenuous
- thin
- thin-bodied
- thinned
- threadlike
- tricksy
- tricky
- twisted
- underhanded
- undeviating
- unerring
- unreal
- unsubstantial
- vague
- vaporous
- veiled
- vulpine
- wary
- wasp-waisted
- watered
- watery
- weak
- willowy
- wily
- windy
- wispy
