Antonyms of adj undrained

1 sense of undrained

Sense 1
undrained (vs. drained) -- (not drained; "preserve wetlands; keep them undrained")

drained (vs. undrained) -- (emptied or exhausted of (as by drawing off e.g. water or other liquid); "a drained marsh"; "a drained tank"; "a drained and apathetic old man...not caring any longer about anything")
        => empty -- (emptied of emotion; "after the violent argument he felt empty")
        => exhausted -- (drained physically; "the day's events left her completely exhausted--her strength drained")

Similarity of adj undrained

1 sense of undrained

Sense 1
undrained (vs. drained) -- (not drained; "preserve wetlands; keep them undrained")

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