Antonyms of adj sinister

3 senses of sinister

Sense 1
baleful, forbidding, menacing, minacious, minatory, ominous, sinister, threatening -- (threatening or foreshadowing evil or tragic developments; "a baleful look"; "forbidding thunderclouds"; "his tone became menacing"; "ominous rumblings of discontent"; "sinister storm clouds"; "a sinister smile"; "his threatening behavior"; "ugly black clouds"; "the situation became ugly")

INDIRECT (VIA alarming) -> unalarming -- (not alarming; assuaging alarm)

Sense 2
black, dark, sinister -- (stemming from evil characteristics or forces; wicked or dishonorable; "black deeds"; "a black lie"; "his black heart has concocted yet another black deed"; "Darth Vader of the dark side"; "a dark purpose"; "dark undercurrents of ethnic hostility"; "the scheme of some sinister intelligence bent on punishing him"-Thomas Hardy)

INDIRECT (VIA evil) -> good -- (morally admirable)

Sense 3
sinister -- (on or starting from the wearer's left; "bar sinister")

INDIRECT (VIA sinistral) -> dextral -- (of or on the right; "a dextral gastropod shell with the apex upward has its opening on the right when facing the observer"; "a dextral flatfish lies with the right eye uppermost")

Similarity of adj sinister

3 senses of sinister

Sense 1
baleful, forbidding, menacing, minacious, minatory, ominous, sinister, threatening -- (threatening or foreshadowing evil or tragic developments; "a baleful look"; "forbidding thunderclouds"; "his tone became menacing"; "ominous rumblings of discontent"; "sinister storm clouds"; "a sinister smile"; "his threatening behavior"; "ugly black clouds"; "the situation became ugly")
       => alarming (vs. unalarming) -- (frightening because of an awareness of danger)

Sense 2
black, dark, sinister -- (stemming from evil characteristics or forces; wicked or dishonorable; "black deeds"; "a black lie"; "his black heart has concocted yet another black deed"; "Darth Vader of the dark side"; "a dark purpose"; "dark undercurrents of ethnic hostility"; "the scheme of some sinister intelligence bent on punishing him"-Thomas Hardy)
       => evil (vs. good) -- (morally bad or wrong; "evil purposes"; "an evil influence"; "evil deeds")

Sense 3
sinister -- (on or starting from the wearer's left; "bar sinister")
       => sinistral (vs. dextral) -- (of or on the left; "a sinistral gastropod shell with the apex upward has its opening on the left when facing the observer"; "a sinistral flatfish lies with the left eye uppermost")