WordPrefixMeaning
Unawareun-Not conscious or informed about something
Uncomfortableun-Causing or feeling slight pain or discomfort
Unacceptableun-Not satisfactory or allowable
Unafraidun-Not frightened or scared
Unattendedun-Not taken care of or watched over
Unbreakableun-Not able to be broken or destroyed
Unchangeableun-Not able to be changed or altered
Unbearableun-Not able to be endured or tolerated
Unconditionalun-Not subject to any conditions
Unconsciousun-Not awake and aware of one’s environment
Undefinedun-Not clearly or precisely defined
Undeniableun-Unable to be denied or disputed
Undecidedun-Not having made a decision
Undesirableun-Not wanted or regarded as good or acceptable
Undetectableun-Not able to be detected
Undervaluedun-Valued too low; not appreciated enough
Underestimateun-To estimate less than the actual amount
Unconventionalun-Not based on or conforming to what is generally done
Unconvincingun-Not persuasive or believable
Unemployedun-Not having a job
Dislikedis-A feeling of distaste or aversion
Disagreedis-To have a different opinion
Disapprovedis-To consider something unacceptable
Disbeliefdis-Inability or refusal to believe
Discomfortdis-A feeling of slight pain or physical unease
Disconnectdis-To detach or separate
Disorganizeddis-Not properly planned or arranged
Disrespectdis-Lack of respect or courtesy
Disruptivedis-Causing disturbance or interruption
Disloyaldis-Not loyal or faithful
Disorderdis-A state of confusion or untidiness
Discontentdis-Lack of contentment or dissatisfaction
Disillusioneddis-Disappointed after discovering the truth
Disobedientdis-Not following rules or commands
Disorienteddis-Confused about direction or situation
Disadvantagedis-An unfavorable circumstance or condition
Distastefuldis-Unpleasant or offensive
Disrespectfuldis-Showing a lack of respect
Incompletein-Not finished or whole; lacking parts
Incorrectin-Not in accordance with fact; wrong
Inaccuratein-Not exactly correct
Inactivein-Not engaging in activity
Inappropriatein-Not suitable or proper
Inconsistentin-Not staying the same or steady
Insecurein-Not confident or assured
Insufficientin-Not enough or adequate
Indecisivein-Unable to make decisions
Indirectin-Not straightforward or direct
Ineffectivein-Not producing the desired effect
Inefficientin-Not working in the best possible way
Inequalityin-Lack of equality
Ineligiblein-Not qualified or allowed
Inflexiblein-Not able or willing to change
Inconsistentin-Not compatible or in agreement
Incompletein-Not finished or lacking parts
Imperfectim-Not perfect; flawed or faulty
Impossibleim-Not able to happen or be done
Impatientim-Unable to wait calmly
Impersonalim-Not influenced by personal feelings
Impoliteim-Not showing good manners
Impureim-Not clean or pure
Immatureim-Not fully developed or grown
Immobileim-Not able to move
Immoralim-Not conforming to moral standards
Impatientim-Not able to wait calmly
Immenseim-Extremely large or great
Impedeim-To obstruct or slow down
Imposeim-To force something to be accepted
Impoverishedim-Poor or lacking resources
Nonexistentnon-Not existing or real
Nonfictionnon-Writing based on facts or real events
Nonprofitnon-Not intended to make a profit
Nonverbalnon-Not using words or speech
Nonsensenon-Without meaning; absurd
Nonstopnon-Without stopping
Noncompliantnon-Not following rules or orders
Nonessentialnon-Not necessary or vital
Nonrenewablenon-Not able to be replaced
Nonconformistnon-Someone who does not conform
Nonresidentnon-Not living in a particular place
Nondrinkablenon-Not safe to drink
Nonnegotiablenon-Not open to discussion
Nontraditionalnon-Not following traditional methods

Let’s practice!