Antonyms of adj underhanded

2 senses of underhanded

Sense 1
sneaky, underhand, underhanded -- (marked by deception; "achieved success in business only by underhand methods")

INDIRECT (VIA crooked) -> straight, square -- (characterized by honesty and fairness; "straight dealing"; "a square deal")

Sense 2
underhand (vs. overhand), underhanded, underarm -- (with hand brought forward and up from below shoulder level; "an underhand pitch"; "an underhand stroke")


Similarity of adj underhanded

2 senses of underhanded

Sense 1
sneaky, underhand, underhanded -- (marked by deception; "achieved success in business only by underhand methods")
       => crooked (vs. straight), corrupt -- (not straight; dishonest or immoral or evasive)

Sense 2
underhand (vs. overhand), underhanded, underarm -- (with hand brought forward and up from below shoulder level; "an underhand pitch"; "an underhand stroke")