1. Without problems or difficulties
   "NASA reported a trouble-free launch"

See also: untroubled

• clear the throat
• clear up
• clear-air turbulence
• clear-cut
• clear-eyed
• clear-headedness
• clear-sighted
• clear-thinking
• clearance
• clearance sale
• clearcole
• clearcutness
• cleared
• clearheaded
• clearing
• clearing bank
• clearing house
• clearly
• clearness
• clearstory
• clearway
• clearweed
• cleat
• cleats
• cleavable