"draining" in the verb sense
1. drain, run out
flow off gradually
"The rain water drains into this big vat"
2. drain
deplete of resources
"The exercise class drains me of energy"
3. drain
empty of liquid drain the liquid from
"We drained the oil tank"
4. enfeeble, debilitate, drain
make weak
"Life in the camp drained him"
"draining" in the adjective sense
1. draining, exhausting
having a debilitating effect
"an exhausting job in the hot sun"
Source: WordNet® (An amazing lexical database of English)
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