| Language | Reflex(es) | Gloss | Grammar | Sources |
|---|
| English |
| English | focus | point of concentration | n | TLL LRC |
| English | fusil | light flintlock musket | n | W7 LRC |
| English | fusilier, fusileer | soldier armed with fusil | n | W7 LRC |
| English | fusillade | many shots fired successively/simultaneously | n | W7 LRC |
| Italic |
| Latin | focus, focī | hearth, fireplace | n.masc | LRC |
| Middle Latin | focus, focī | seat/central point of disease | n.masc | CDC LRC |
| New Latin | focus, focī | focus, point where light rays from lens converge | n.masc | CDC LRC |
| Portuguese | fogo | fire | n | TLL LRC |
| Spanish | fuego | fire | n | TLL LRC |
| Old French | foisil | fusil | n | W7 LRC |
| French | feu | fire | n | TLL LRC |
| French | fusil | fusil, rifle | n | TLL LRC |
| French | fusiller | to fire, shoot | vb | W7 LRC |
| Italian | fuoco | fire | n | TLL LRC |