Antonyms of adj companionable

1 sense of companionable

Sense 1
companionable -- (suggestive of companionship; "a companionable pet")

INDIRECT (VIA sociable) -> unsociable -- (not inclined to society or companionship; "an unsociable nature...shy and reserved"; "generally unsociable except with intimate friends"; "unsociable behavior"; "an unsociable neighborhood")

Similarity of adj companionable

1 sense of companionable

Sense 1
companionable -- (suggestive of companionship; "a companionable pet")
       => sociable (vs. unsociable) -- (inclined to or conducive to companionship with others; "a sociable occasion"; "enjoyed a sociable chat"; "a sociable conversation"; "Americans are sociable and gregarious")