Antonyms of adj two-part

1 sense of two-part

Sense 1
bipartite, two-part, two-way -- (involving two parts or elements; "a bipartite document"; "a two-way treaty")

INDIRECT (VIA multilateral) -> unilateral, one-sided -- (involving only one part or side; "unilateral paralysis"; "a unilateral decision")

Similarity of adj two-part

1 sense of two-part

Sense 1
bipartite, two-part, two-way -- (involving two parts or elements; "a bipartite document"; "a two-way treaty")
       => multilateral (vs. unilateral), many-sided -- (having many parts or sides)