1. In an unnecessary manner
   "they were unnecessarily rude" 
2. Without any necessity
   "this marathon would exhaust him unnecessarily"

See also: unnecessary

Antonym: necessarily

• disk-jockey
• disk-shaped
• diskette
• disklike
• dislikable
• dislike
• disliked
• dislocate
• dislocated
• dislocation
• dislodge
• dislodgement
• dislodgment
• dislogistic
• disloyal
• disloyally
• disloyalty
• dismal
• dismally
• dismantle
• dismantled
• dismantlement
• dismantling
• dismast
• dismay