Meaning ‘not’ or ‘lack of’, ‘opposite of’, or ‘apart, away’, but also used as an intensifier (meaning ‘completely’). The final sound of this prefix can change (assimilate) to match the beginning sound of the base/word.

dis-dif-
disable
disabuse
disagree
disallow
disarm
disarray
disaster
disavow
disband
disbar
disburse
discard
discharge
disclose
discolour
discord
discount
discover
discreet
discuss
disdain
disease
disfavour
disfigure
disgorge
disgrace
disguise
disgust
dishevel
dishonest
dishonour
disinterest
disjoint
dislike
dislodge
disloyal
dismiss
dismount
disobey
disorder
disown
dispel
dispense
disperse
dispirit
displace
display
dispose
disprove
dispute
disquiet
disregard
disrepair
disrobe
disrupt
dissect
dissent
dissolve
dissuade
distant
distaste
distend
distinct
distract
distrust
disturb
disunite
disuse
differ
difficult
diffident
diffract
diffuse