Reliving painful experiences can be emotionally draining. Operating the heavy machinery is draining work.

Synonyms for DRAINING: exhausting, fatiguing, debilitating, enervating, wearing, demoralizing, discouraging, dispiriting; Antonyms of DRAINING: involving, interesting, absorbing, engaging, …

Something that's draining tires you out, either physically or emotionally. Some people thrive on spending long days with young children, while others find it to be completely draining. Running a marathon or a …

To or into the condition of being wasted or lost: All of our best laid plans are down the drain.

It's very hard work, it's very draining. This work is physically exhausting and emotionally draining. Collins English Dictionary. Copyright © HarperCollins Publishers

DRAIN definition: to withdraw or draw off (a liquid) gradually; remove slowly or by degrees, as by filtration. See examples of drain used in a sentence.

to empty by drawing off liquid: [~ + object] to drain a swamp. [~ + object (+ of + object)] Drain the wound (of blood) before you apply the bandage. [no object] The crankcase has to drain before you put on …