The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
streig-
DEFINITION:
To stroke, rub, press. European root. Derivatives include streak, prestige, and restrict. I. Basic form *streig-.1a.strike, from Old English strcan, to stroke; b.tricot, from Old French estriquier, to strike. Both a and b from Germanic *strkan.2.strickle, from Old English stricel, implement for leveling grain, from Germanic diminutive *strik-ila-.3.streak, from Old English strica, stroke, line, from Germanic *strikn-. II. O-grade form *stroig-.stroke1, from Old English *strc, stroke, from Germanic *straik-. III. Zero-grade form *strig-.1. Suffixed form *strig--.strigose, from Latin striga, row of grain, furrow drawn lengthwise over the field. 2. Suffixed form *strig-y-.stria, from Latin stria, furrow, channel. 3. Nasalized zero-grade form *stri-n-g-.strain1, strait, stress, stretto, strict, stringendo, stringent; astringent, constrain, distrain, distress, prestige, restrain, restrict, from Latin stringere, to draw tight, press together. 4.strigil, from Latin strigilis, strigil, possibly akin to stringere. (Pokorny 1. streig-, 2. streig- 1036, 4. ster- 1028.)