passionless (adj.)

• apathetic
• arctic
• autistic
• blunt
• catatonic
• chilly
• cold
• cold-blooded
• coldhearted
• cool
• detached
• dispassionate
• drugged
• dull
• emotionless
• frigid
• frosted
• frosty
• frozen
• heartless
• icy
• immovable
• impassive
• indifferent
• inhibited
• insusceptible
• loveless
• objective
• obtuse
• self-absorbed
• soulless
• spiritless
• unaffected
• unaffectionate
• unambitious
• uncaring
• unconcerned
• undersexed
• undesirous
• uneager
• unemotional
• unenthusiastic
• unfeeling
• unimpassioned
• unimpressionable
• unloving
• unmoved
• unresponsive
• unsusceptible
• unsympathetic
• untouchable