| Idiom | Meaning | Example | 
| hear me out | 
listen to all that I have to say, do not interrupt me
 | 
Please, hear me out. Wait until I finish before you comment.
 | 
| heart is in the right place | 
people who encourage you even if they cannot help
 | 
Max is too old to help us now, but his heart's in the right place.
 | 
| heat is on | 
(See the heat is on)
 | 
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| heaven forbid | 
we should not do it,  we are not permitted
 | 
Grandma said, "Heaven forbid! Don't play hockey on Sunday!"
 | 
| heaven help us | 
we are facing a crisis, we need a lot of help
 | 
Heaven help us if we have an accident with Dad's Mercedes.
 | 
| heavens | 
goodness, oh dear, gosh
 | 
Heavens! You weren't supposed to arrive until Friday!
 | 
| heavens to Betsy | 
oh no, heavens
 | 
Heavens to Betsy! I can't find my purse!
 | 
| heavy | 
very serious, not fun
 | 
War is a heavy topic because it involves death and destruction.
 | 
| heavy day | 
(See a heavy day)
 | 
 | 
| heavy duty | 
very difficult, demanding
 | 
I have to work hard at math. It's a heavy-duty course.
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