Etymology of the Latin word conclusio
the Latin word conclusio (rounded arrangement of sentence; peroration, logical conclusion; state of siege; enclosing; fastening in position)
derived from the Latin word conclusus (restricted, closed, confined; shutting up; confining)
derived from the Latin word concludere (conclude, finish; define; shut up, confine; contain)
using the Latin prefix com-
derived from the Latin word claudere (close, shut, block up; limp, stumble, falter)