"arcs" in the noun sense
1. discharge, spark, arc, electric arc, electric discharge
electrical conduction through a gas in an applied electric field
a continuous portion of a circle
3. bow, arc
something curved in shape
"arcs" in the verb sense
1. arch, curve, arc
form an arch or curve
"her back arches"
"her hips curve nicely"
Source: WordNet® (An amazing lexical database of English)
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