A curved line is a line that bends in an ARC or circle shape. The term 'curved line' can be broken down into several different crossword solutions, such as ARC (3 letters), SLUR (4 letters), ARCS (4 letters), ESS (3 letters), and ARCED (5 letters). ARC stands for an arch or curved line, while SLUR is a smooth curve connecting two notes in music. ARCS is the plural form of ARC, and ESS is a curved line used in handwriting. Finally, ARCED is the past tense of ARC, meaning to have curved.