WordNet sense 1 (a road junction at which traffic streams circularly around a central island):

circle, rotary, traffic circle

WordNet sense 2 (large mechanical apparatus with seats for children to ride on):

carousel, carrousel, merry-go-round, whirligig

WordNet sense 3 (marked by obliqueness or indirection in speech or conduct):

circuitous

WordNet sense 4 (extended senses; not direct in manner or language or behavior or action):

indirect

WordNet sense 5 (deviating from a straight course):

devious