adherent
UK: ədˈhɪərənt | US: ədˈhɪrənt
n. a supporter or follower of a person, group, or idea
adj. sticking firmly to a surface or substance
The word "adherent" originates from Latin adhaerentem (present participle of adhaerēre), combining ad- (meaning "to") and haerēre (meaning "to stick"). The morpheme her (from haerēre) evolved into the modern sense of attachment, both physically (as in glue) and metaphorically (loyalty to a cause). The suffix -ent denotes an agent (noun) or quality (adjective), reflecting its dual usage.
She has been a loyal adherent of the environmental movement for years.
The tape must be fully adherent to the surface to prevent leaks.
Political adherents gathered to support their candidate.
The adherent qualities of the new adhesive impressed the engineers.
As an adherent of classical music, he rarely listens to modern genres.