Yes, "fit for purpose" is typically hyphenated when used as a compound adjective before a noun, as in "fit-for-purpose solution." However, when used in a sentence without preceding a noun, it does not require hyphens, such as "The solution is fit for purpose." The hyphenation helps clarify the phrase's meaning in specific contexts.
Hyphens not needed
If you're using the phrase as an adjective (example "This easy-to-use remote is great!") then it will definitely need the hyphens. Otherwise, the hyphens are incorrect.
Yes it should.
no hyphens - 57 years old is what you are.
No, you should not.
Hyphens are used to link words together to form compound words, such as "well-being" or "mother-in-law." They can also be used to separate syllables in words that are broken at the end of a line in writing. Additionally, hyphens are used in some prefixes, suffixes, and to avoid ambiguity or confusion in writing.
As long as they're fit for purpose.
No. Use hyphens when creating a compound adjective, for example a two-foot width or a four-foot depth.
There are no hyphens in the word ago.
hyphens
I really doesn't matter, but if you're writing an essay or something, keep all words that can have hyphens, either wil hyphens or without them. My point is that you want to be consistent.
Fit for purpose means good enough to do the job it was made to do.