knee-jerk
Without thinking first
Knee-jerk describes a reaction that is automatic, unthinking, and immediate—like the reflexive kick of a leg when a doctor taps below the kneecap.
The term almost always carries a dismissive tone, suggesting the response lacks genuine thought or consideration: His knee-jerk opposition to any new policy made negotiations impossible.
A knee-jerk reaction is one you have before you've had time to actually think about something.
Directed back at subject
- automaticOperating without intervention
- unthinkingLacking conscious thought
- involuntaryNot under conscious control
- impulsiveActing without deliberation
spontaneous · visceral · gut · reactive · unconscious · immediate · snap · hasty
Of the kneecap
- reflexInvoluntary stimulus response
- tendonMuscle-to-bone connector
- hammerTool for striking nails
- neurologicalOf the nervous system
quadriceps · reflex arc · stimulus · response · physical exam · neurologist · spinal · sensory
reflexive
Directed back at subject
- automaticOperating without intervention
- unthinkingLacking conscious thought
- involuntaryNot under conscious control
impulsive · spontaneous · visceral · gut · reactive · unconscious · immediate · snap · hasty · rash
patellar
Of the kneecap
neurological · quadriceps · reflex arc · stimulus · response · physical exam · neurologist · spinal · sensory · motor
- improvisationimprovised, impromptu, ad lib, freestyle, ad-lib
- reactionsreaction, response, gasp, wince, flinch
- reflexesreflex, reflexes, reflex action, reflex response, quick reflexes
- emotional responsesfacial expression, tone of voice, temper tantrum, mood swing, silent treatment
- thoughtlessthoughtless, unthinking, mindless, unreflective, unconsidered
- impulsesimpulse, urge, impulse buying, blurting out, whim
knee-jerkdeliberate
Consciously chosen, not accidental
considered · thoughtful · reasoned · calculated · measured
knee-jerkunpredictable
Cannot be anticipated
nuanced · surprising · unconventional · original · heterodox
jerky, kneel, knees, kneecap, jerked, kneeling, jerking, jerkiness, jerkwater