Antonyms of adj sexual

2 of 3 senses of sexual

Sense 2
sexual (vs. asexual) -- (having or involving sex; "sexual reproduction"; "sexual spores")

asexual (vs. sexual), nonsexual -- (not having or involving sex; "an asexual spore"; "asexual reproduction")
        => agamic, agamous, agamogenetic, apomictic, parthenogenetic -- ((of reproduction) not involving the fusion of male and female gametes in reproduction)
        => fissiparous -- (reproducing by fission)
        => neuter, sexless -- (having no or imperfectly developed or nonfunctional sex organs)
        => vegetal, vegetative -- ((of reproduction) characterized by asexual processes)

Sense 3
intimate, sexual -- (involved in a sexual relationship; "the intimate (or sexual) relations between husband and wife"; "she had been intimate with many men"; "he touched her intimate parts")

INDIRECT (VIA sexy) -> unsexy -- (not sexually aroused or arousing)

Similarity of adj sexual

3 senses of sexual

Sense 1
sexual -- (of or relating to or characterized by sexuality; "sexual orientation"; "sexual distinctions")

Sense 2
sexual (vs. asexual) -- (having or involving sex; "sexual reproduction"; "sexual spores")
       => intersexual -- (existing or occurring between the sexes)
       => sexed -- (having sexual differentiation)
       => unisexual -- (relating to only one sex or having only one type of sexual organ; not hermaphroditic)

Sense 3
intimate, sexual -- (involved in a sexual relationship; "the intimate (or sexual) relations between husband and wife"; "she had been intimate with many men"; "he touched her intimate parts")
       => sexy (vs. unsexy) -- (marked by or tending to arouse sexual desire or interest; "feeling sexy"; "sexy clothes"; "sexy poses"; "a sexy book"; "sexy jokes")