Definitions
That which drains.
Word origin
From drain (verb) + -er.
Used in a sentence
“The radical shift in mentality is even more necessary when analysts see Education simply as a drainer of resources.”
“I know that poor form is one of the biggest drainers of energy, so even though I slowed down significantly I made a very conscious effort to maintain good form.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Sink-side rack”7 letters
Not quite right?
"Search similar patterns."
D______