halve / have are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
halve: (verb) divide by two; divide into halves.
have: (verb) have or possess, either in a concrete or an abstract sense. (verb) have as a feature. (verb) have a personal or business relationship with someone. (verb) have left. (verb) be confronted with. (verb) undergo. (verb) suffer from; be ill with. (verb) achieve a point or goal.
halve: hh·AE·v
have: hh·AE·v
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)