freehand

Từ điển Oxford Advanced Learner 8th

▪ I. free·hand [freehand] BrE [ˈfriːhænd] NAmE [ˈfriːhænd] adjective only before noun
drawn without using a ruler or other instruments
•a freehand drawing
 
▪ II. free·hand adverb
•to draw freehand
Main entry: ↑freehand_derived