| 1 | English | strain | Race; lineage, pedigree; A particular variety of... |
| 2 | Middle English | straynen | — |
| 3 | Old French | estreindre | to strain |
| 4 | Vulgar Latin | strinctus | tightened, compressed |
| 5 | Latin | strictus | tightened, compressed, having been tightened;... |
| 6 | Latin | stringere | second-person singular future passive indicative... |
| 7 | Latin | stringo | I press, tighten, compress; I unsheath |
| 8 | Proto-Italic | stringō | — |
| 9 | Proto-Indo-European | streyg- | to strike; to shear |
| 10 | Proto-Indo-European | (s)ter- | strong, firm, stiff, rigid; rigid, stiff; to... |