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

See also: unnecessary

Antonym: necessarily

• burrito
• burrlike
• burro
• burro deer
• Burroughs
• burrow
• burrower
• burry
• bursa
• bursa omentalis
• bursal
• bursar
• bursary
• burse
• Bursera
• Bursera microphylla
• Bursera simaruba
• Burseraceae
• bursiform
• bursitis
• burst
• burst forth
• burst in on
• burst out
• burst upon