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Related to avoid: avoid doing
avoid (someone or something) like the plague
To consciously stay away from someone or something. I didn't do my homework my last night, so I'm avoiding my teacher like the plague. My dog is terrified of cats and avoids them like the plague.
avoid someone or something like the plague
Fig. to ignore or keep away from someone or something totally. What's wrong with Bob? Everyone avoids him like the plague. I don't like opera. I avoid it like the plague.
let alone someone or something
not to mention or think of someone or something; not even to take someone or something into account. (Fixed order.) Do I have a dollar? I don't even have a dime, let alone a dollar. I didn't invite John, let alone the rest of his family.
let someone or something aloneand leave someone or something alone; leave someone or something be
to avoid touching, bothering, or communicating with someone or something. Leave me alone. I don't want your help. Let it alone! Don't touch it! It may be hot!
avoid like the plague
Evade or elude at any cost, shun. For example, Since Bob was taken into police custody, his friends have been avoiding him and his family like the plague . This seemingly modern expression dates from the Latin of the early Middle Ages, when Saint Jerome (a.d. 345-420) wrote, "Avoid, as you would the plague, a clergyman who is also a man of business." The plague, a deadly infectious disease in his day, has been largely wiped out, but the term remains current.
1. See leave someone alone.
2. Not to mention, as in We have no room for another house guest, let alone an entire family. [c. 1800]
avoid someone/something like the plague
If you avoid someone or something like the plague, you do everything possible to avoid them. I would avoid him like the plague when his wife was around. The athlete must avoid all extra sugar like the plague. Note: The plague is bubonic plague, a disease which killed over 50 million people in Europe and Asia during the 14th century and was referred to as the Black Death.
let aˈloneused after a statement to emphasize that because the first thing is not true or possible, the next thing cannot be true or possible either: I wouldn’t speak to him, let alone trust him or lend him money. ♢ She didn’t even apologize, let alone offer to pay for the damage.
avoid somebody/something like the ˈplague(informal) avoid somebody/something completely: It was the sort of restaurant that I would normally have avoided like the plague.
A plague is an infectious disease that kills a lot of people.
fall into/avoid the trap of doing somethingdo/avoid doing something that is a mistake but which seems at first to be a good idea: Parents sometimes fall into the trap of trying to do everything for their children.
Not to mention; much less: "Their ancestors had been dirt poor and never saw royalty, let alone hung around with them" (Garrison Keillor).