| 1 | Old French | closure | — |
| 2 | Late Latin | clausura | lock, bar, bolt; clasp; lock, bar, bolt; clasp |
| 3 | Latin | clausus | closed, inaccessible; having been closed;... |
| 4 | Latin | claudere | present active infinitive of claudō;... |
| 5 | Latin | claudo | I shut, close, lock; I imprison, confine; I... |
| 6 | Proto-Italic | klaudō | close |