/kənˈkluːd/
[verb] To bring something to an end, or to reach a decision or opinion after thinking carefully about the facts. It can also mean to complete an agreement or deal.
Every time you 'conclude' something, you are literally 'shutting it in' — sealing your thoughts behind a closed door.
The word 'conclude' traces its roots to classical Latin, where the verb 'concludere' meant to shut up, enclose, or bring to an end. This Latin word was built from two parts: the prefix 'com-', meaning together or completely, and 'claudere', meaning to shut or close. The connection to closing is no accident — the Romans thought of finishing something as the act of shutting a door on it, sealing it away so nothing more could enter or escape.
The root 'claudere' was remarkably productive in Latin, giving rise to a family of words all built around the idea of closing or shutting. From this same root, Latin 'claudere' passed into Old French as 'clore', and from there into English as 'close'. Another branch gave us 'include' (Latin 'includere', meaning to shut in), 'exclude' (Latin 'excludere', meaning to shut out), and 'preclude' (Latin 'praecludere', meaning to shut off beforehand). Each of these arrived in English through Latin directly or via Old French, but they all carry the memory of that original shut door inside them.
English borrowed 'conclude' directly from Latin 'concludere' in the 14th century, during the great wave of Latin borrowing that followed the Norman Conquest. At this time, educated English writers were heavily influenced by Latin legal and scholarly texts, and 'conclude' entered the language as a formal, intellectual word. Its earliest English uses were closely tied to logic and argument — to conclude was to reach the final, sealed result of a chain of reasoning, the point at which no further debate was possible.
Over time, the word's meaning spread outward from logic into everyday life. By the 15th and 16th centuries, 'conclude' was being used to describe the ending of a speech, a treaty, a journey, or a conversation. The core idea of sealing something off remained, but the word became flexible enough to cover almost any kind of ending or final decision. Shakespeare used it freely in this broader sense, helping to cement it as a natural part of spoken and written English.
What makes 'conclude' particularly interesting is how perfectly its structure reflects its meaning. The Latin prefix 'com-' suggests completion — not just any closing, but a thorough, final one. When you conclude something, you are not simply stopping; you are shutting it completely, with the implication that the matter is now settled. This sense of finality is why we still use 'conclusion' for the last paragraph of an essay or the verdict at the end of a legal argument — it is the moment when the door is firmly closed and the case is sealed.