Antonyms of adj workmanlike

1 sense of workmanlike

Sense 1
workmanlike -- (worthy of a good workman; "a competent job"; "the book is a workmanlike job with chronology and bibliography and index")

INDIRECT (VIA competent) -> incompetent -- (not qualified or suited for a purpose; "an incompetent secret service"; "the filming was hopeless incompetent")

Similarity of adj workmanlike

1 sense of workmanlike

Sense 1
workmanlike -- (worthy of a good workman; "a competent job"; "the book is a workmanlike job with chronology and bibliography and index")
       => competent (vs. incompetent) -- (properly or sufficiently qualified or capable or efficient; "a competent typist")

2022, Cloud WordNet Browser