[stur.dy] adj stur.di.er ; -est [ME, brave, stubborn, fr. MF estourdi stunned, fr. pp. of estourdir to stun, fr. (assumed) VL exturdire, fr. L ex- + (assumed) VL turdus simpleton, fr. L, thrush--more at thrush] (14c) 1 a: firmly built or constituted: stout b: hardy c: sound in design or execution: substantial
2. a: marked by or reflecting physical strength or vigor b: firm, resolute c: rugged, stable syn see strong -- stur.di.ly adv -- stur.di.ness n