To say that the Grand Canyon is nice is to understate its grandeur.
overstate
Overstate, exaggerate.
overstate, magnify
Minimize? Belittle?
yes
Unethical and illegal.
Depreciate, minimize or understate.
understate, mute, tone down, subdue
Downplaying the significance of an event or emotion.
Simply to avoid taxes
i do not know how to use embalming in a sentence. (there is the sentence)
So- you are asking when to use 'when' in a sentence. When you are asking how to use when in a question, you are already using when in a sentence, because a question actually is a sentence. I like to use when in a sentence whenever I like.