Antonyms of adj expeditious

1 sense of expeditious

Sense 1
expeditious -- (marked by speed and efficiency)

INDIRECT (VIA efficient) -> inefficient -- (not producing desired results; wasteful; "an inefficient campaign against drugs"; "outdated and inefficient design and methods")

Similarity of adj expeditious

1 sense of expeditious

Sense 1
expeditious -- (marked by speed and efficiency)
       => efficient (vs. inefficient) -- (being effective without wasting time or effort or expense; "an efficient production manager"; "efficient engines save gas")