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it wouldn't do (someone) any harm (to do something)
It would or may be good, pragmatic, or beneficial for someone (to do something). You know, it wouldn't do you any harm to comb your hair from time to time. I know that the managers are trying to cut costs, but it wouldn't do them any harm to treat us to a staff lunch every once in a while. Jonathan should try and spend more time with his mother. It wouldn't do him any harm, after all.
there is no harm in (someone's) doing (something)
Doing something may be good, pragmatic, or beneficial, and will not cause any problems or harm. The contractor might not be willing to go any lower on the price, but there's no harm in asking. Sure, you might not be accepted for the PhD program, but there's no harm in your trying, is there?
it does no harm (for someone) to do (something)
Doing something may be good, pragmatic, or beneficial, and will not cause any problems or harm. The contractor might not be willing to go any lower on the price, but it does no harm to ask. Sure, you might not be accepted for the PhD program, but it does no harm for you to try, does it?
come to harm
To encounter an unpleasant situation, often one involving injury or damage. If anyone comes to harm in this operation, you will have to answer to the chief. My car came to harm during the storm when a tree branch fell on it.
do more harm than good
To try to help but create more problems in the process. I'm worried that I did more harm than good by applying that tourniquet by myself. I should have just waited for the paramedics to get here.
harm a hair on (one's) head
To hurt or injure someone. This phrase is often used in the negative. If I find that he harmed a hair on your head, I'll go to his house right now!
no harm, no foul
If there was no bad outcome to an action, then there's no need to be angry or upset about it. A: "Oh, excuse me! I'm so sorry for knocking over your glass!" B: "It's OK, it was empty. No harm, no foul!"
See also: foul
wouldn't harm a fly
To be particularly shy, diffident, or timid by nature. My brother is a very sweet, warm-hearted man who wouldn't harm a fly. How can you suspect him of committing this crime?
come to harm
to experience something bad; to get damaged or harmed. I sincerely hope that you do not come to harm. I hope no one comes to harm.
*in harm's way
Fig. liable to be harmed; subject to potential causes of harm. (*Typically: be ~; get ~; put someone ~.) Soldiers are expected to know what to do when they are in harm's way.
See also: way
No harm done.
It is all right. No one or nothing has been harmed. It's okay. No harm done. A: I am sorry I stepped on your toe. B: No harm done.
*out of harm's way
Fig. not liable to be harmed; away from any causes of harm. (*Typically: be ~; get ~; get someone ~.) We should try to get all the civilians out of harm's way.
do someone wrong
Also, do someone damage or harm . Injure someone; be unfaithful or disloyal; act unjustly or unfairly toward someone. For example, John's done me wrong, and I intend to tell him so, or She did him real damage when she started that rumor: The first term dates from the late 1300s; the substitutions of damage and harm are newer. However, while these locutions are still current, a more common modern usage is to turn them into verbal phrases-that is, wrong someone, harm someone, damage someone.
See also: wrong
out of harm's way
In a safe condition or place, as in We fenced the yard to keep the children out of harm's way. This idiom was first recorded about 1661.
wouldn't hurt a flyor
wouldn't harm a fly
If someone wouldn't hurt a fly or wouldn't harm a fly, they are very kind and gentle. She was such a lovely girl, who wouldn't have hurt a fly. He is, he insists, a pacifist, who would not harm a fly.
out of harm's way
COMMON If someone or something is out of harm's way, they are in a safe place away from danger or from the possibility of being damaged. For parents, this is an easy way of keeping their children entertained, or simply out of harm's way. Workers scrambled to carry priceless objects out of harm's way.
there's no harm in doing something
COMMON People say there's no harm in doing something to mean that it will not cause problems and may have a good result. They are not always willing to take on untrained workers, but there's no harm in asking. As I see it, there is no harm in cooperating with the police.
wouldn't hurt (or harm) a flyused to emphasize how inoffensive and harmless a person or animal is.
not harm a hair of someone's headnot cause someone the slightest harm.
out of harm's wayin a safe place.
1996 Frank McCourt Angela's Ashes Take down the Pope and hide him in the coal hole…where he won't be seen and he'll be out of harm's way.
there is no harm in —the course of action specified may not guarantee success but is at least unlikely to have unwelcome repercussions.
1997 Arundhati Roy The God of Small Things He decided that since she couldn't have a husband there was no harm in her having an education.