Yes, "life-threatening" is hyphenated. The hyphen is used to connect the words "life" and "threatening" to clarify that they work together as a single adjective describing a situation or condition that poses a serious risk to life. This hyphenation helps avoid ambiguity in the phrase.
relief of pain and other discomfort
In some cases yes, it can cause cancer and other problems that can be lifethreatening
It is not hyphenated.
No it's not hyphenated.
Motorcycle is not hyphenated
words are only hyphenated when they have a separate meaning when separated than they do when hyphenated
It can be. Some words can be seen both hyphenated and non-hyphenated.
Yes it should be hyphenated.
No, "hardworking" is not hyphenated.
No. Well above is not hyphenated.
Yes it should be hyphenated.
The word desperate hyphenated