The words ‘half’ and ‘halve’ are related. They also sound quite similar when spoken. It is therefore easy to mix them up in writing, even if English is your first language. But these words are different in important ways, so check out our guide to how they should be used.
‘Half’ is usually a noun (i.e. a naming word). We use it when referring to fifty percent of something (or an amount roughly equivalent to fifty percent):
156 is half of 312.
The first half of the play was great, but the second half was boring.
The plural of ‘half’ is ‘halves’. This change from an ‘f’ to a ‘v’ in the plural might seem strange, but we also see it in similar words, such as when ‘leaf’ becomes ‘leaves’ or when ‘shelf’ becomes ‘shelves’.
We can also use ‘half’ to modify other words. For instance:
I’m half thinking about going back to university.
I got these shoes for half price online.
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In the first sentence above, ‘half’ is an adverb that modifies the verb ‘thinking’. In the second, it is an adjective that modifies the noun ‘price’. But in both cases, it implies being divided or half of a whole.
‘Halve’ is a verb (i.e. an action word) meaning ‘divide into two equal parts’:
He halved the apple with a knife.
Automating the process will halve costs.
All variations of the verb form of this word are spelled with a ‘v’ (i.e. halve, halves, halved, halving). Keep this in mind if you are describing an action.
These words might sound similar, but it is important not to mix them up:
One issue here is that the plural of ‘half’ is spelled the same as the present tense verb ‘halves’. People therefore assume that ‘halve’ is a singular noun. However, as long as you can remember that the singular ‘half’ is always spelled with an ‘f’, it should be easy to avoid errors.
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