Comparative form of sightly: more sightly(adjective)
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Use "sightlier" in a sentence
"The interior of the honky-tonk was no sightlier than the exterior."
"He could have gone on and found within five miles two or three sightlier, healthier spots."
"It did seem as if airmen, who must be brimming like full cups with wine of romance and imagination, ought to have invented sightlier houses for their beloved machines."