| 1 | English | trust | Confidence in or reliance on some person or... |
| 2 | Middle English | trust | — |
| 3 | Old Norse | traust | confidence, help, protection; trust; benefit,... |
| 4 | Proto-Germanic | traustą | shelter; help; aid; trust; confidence; alliance |
| 5 | Proto-Indo-European | dreu- | tree; firm, solid, steadfast |