stifled (adj.)

• arcane
• bated
• blurred
• cabalistic
• censored
• choked
• classified
• close
• closed
• concealed
• crushed
• cryptic
• dark
• dead
• deadened
• dull
• dulled
• enigmatic
• esoteric
• flat
• guttural
• harsh
• hawking
• hermetic
• hidden
• hoarse
• hush-hush
• inarticulate
• indistinct
• latent
• muffled
• muted
• muzzy
• mysterious
• nasal
• occult
• quashed
• quavering
• quelled
• repressed
• restricted
• secret
• shaking
• shaky
• smashed
• smothered
• snuffling
• softened
• squashed
• squelched
• strangled
• subdued
• suppressed
• thick
• throaty
• tremulous
• ulterior
• undisclosed
• unrevealed
• unspoken
• untellable
• untold
• unutterable
• unuttered
• velar