Learn English – Word/phrase for negative side effect(s)

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In an essay I want to enumerate and describe negative aspects of using a popular and working tool. Since such issues are usually overlooked (or even underestimated), I call them negative side effects. Now, I'm looking for a better (preferably single) word/phrase to describe those negative side effects, something other than drawback or disadvantage.

Best Answer

Any adverse and unwanted effect/: a bad effect or result of something : fallout

A phenomenon that follows and is caused by some previous phenomenon: upshot-

  • Do not confuse "Upshot" with "upside," which is exclusively positive.

  • Though the "up" metaphor may lead you to think of a positive connotation, the word is often used for negative effects.