rebarbative
UK: rɪˈbɑːbətɪv | US: rɪˈbɑːrbətɪv
adj. causing annoyance, irritation, or aversion; repellent or unattractive
The word "rebarbative" originates from French rébarbatif, derived from re- (expressing intensity) + barbe ("beard," from Latin barba). The metaphorical sense evolved from the idea of something "bearded" or "thorny" being harsh or unpleasant, later generalized to mean "irritating" or "repellent." The suffix -ative (from Latin -ativus) forms adjectives indicating a tendency or quality.
His rebarbative manner made it difficult to collaborate with him.
The rebarbative smell of the chemical drove everyone out of the lab.
She found his criticism unnecessarily rebarbative.
The building’s rebarbative facade clashed with the neighborhood’s charm.
Despite its rebarbative appearance, the plant had medicinal properties.