1. Without ceremony or formality
   - unceremonious

See also: informal

• four-leaf
• four-leaved
• four-letter Anglo-Saxon word
• four-letter word
• four-lined leaf bug
• four-lined plant bug
• four-lobed
• four-membered
• four-minute man
• four-needled
• four-o'clock family
• four-part harmony
• four-party
• four-petaled
• four-petalled
• four-ply
• four-poster
• four-pounder
• four-pronged
• four-sided
• four-spot
• four-stroke engine
• four-stroke internal-combustion engine
• four-tailed bandage
• four-wheel