system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does unisex mean "both sexes" while most every other word with the prefix "uni-" means one?
gpt
Because the *uni-* prefix can either mean 'one', or 'shared' — a group that becomes one. Consider the word 'university', which comes from the Latin *universitas*; there is precedent for that prefix indicating a consolidated group rather than one pure entity.