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

See also: unnecessary

Antonym: necessarily

• Thurs.
• Thursday
• thus
• thus far
• thusly
• thwack
• thwart
• thwarted
• thwarter
• thwarting
• thwartwise
• thy
• thylacine
• Thylacinus
• Thylacinus cynocephalus
• Thylogale
• thyme
• thyme camphor
• thyme-leaved sandwort
• thyme-leaved speedwell
• Thymelaeaceae
• Thymelaeales
• thymic
• thymic acid
• thymidine