Antonyms of adj fluent

2 senses of fluent

Sense 1
fluent, fluid, liquid, smooth -- (smooth and unconstrained in movement; "a long, smooth stride"; "the fluid motion of a cat"; "the liquid grace of a ballerina")

INDIRECT (VIA graceful) -> awkward -- (lacking grace or skill in manner or movement or performance; "an awkward dancer"; "an awkward gesture"; "too awkward with a needle to make her own clothes"; "his clumsy fingers produced an awkward knot")

Sense 2
eloquent, facile, fluent, silver, silver-tongued, smooth-spoken -- (expressing yourself readily, clearly, effectively; "able to dazzle with his facile tongue"; "silver speech")

INDIRECT (VIA articulate) -> inarticulate, unarticulate -- (without or deprived of the use of speech or words; "inarticulate beasts"; "remained stupidly inarticulate and saying something noncommittal"; "inarticulate with rage"; "an inarticulate cry")

Similarity of adj fluent

2 senses of fluent

Sense 1
fluent, fluid, liquid, smooth -- (smooth and unconstrained in movement; "a long, smooth stride"; "the fluid motion of a cat"; "the liquid grace of a ballerina")
       => graceful (vs. awkward) -- (characterized by beauty of movement, style, form, or execution)

Sense 2
eloquent, facile, fluent, silver, silver-tongued, smooth-spoken -- (expressing yourself readily, clearly, effectively; "able to dazzle with his facile tongue"; "silver speech")
       => articulate (vs. inarticulate) -- (expressing yourself easily or characterized by clear expressive language; "articulate speech"; "an articulate orator"; "articulate beings")