| 1 | English | logic | logical; A method of human thought that involves... |
| 2 | French | logique | logic; logical |
| 3 | Latin | logica | nominative feminine singular of logicus;... |
| 4 | Latin | logicus | logical; reasonable |
| 5 | Ancient Greek | λογικός | Belonging to speech: prose; Belonging to reason:... |
| 6 | Ancient Greek | λόγος | That which is said: word, sentence, speech,... |
| 7 | Ancient Greek | λέγω | I put in order, arrange, gather; I choose, count,... |
| 8 | Proto-Indo-European | leǵ- | to gather, collect, with derivatives meaning to... |