Antonyms of adj onerous

1 sense of onerous

Sense 1
burdensome, onerous, taxing -- (not easily borne; wearing; "the burdensome task of preparing the income tax return"; "my duties weren't onerous; I only had to greet the guests"; "a taxing schedule")

INDIRECT (VIA heavy) -> light -- (psychologically light; especially free from sadness or troubles; "a light heart")

Similarity of adj onerous

1 sense of onerous

Sense 1
burdensome, onerous, taxing -- (not easily borne; wearing; "the burdensome task of preparing the income tax return"; "my duties weren't onerous; I only had to greet the guests"; "a taxing schedule")
       => heavy (vs. light) -- (marked by great psychological weight; weighted down especially with sadness or troubles or weariness; "a heavy heart"; "a heavy schedule"; "heavy news"; "a heavy silence"; "heavy eyelids")