An Etymological Dictionary of the German Language/strotzen

by Friedrich Kluge

strotzen, vb., ‘to be puffed up, teem, boast of,’ from the equiv. late MidHG. strotzen, wk. vb. The Teut. root strū̆t, which is not widely diffused, appears in E. strut (to which OIc. þrútenn, ‘swollen,’ is allied; comp. OIc. þjórr, equiv. to HG. Stier). To this ModHG. Strauß, ‘contest,’ with the evolved meaning ‘to swell with anger,’ and its cognates are allied?.