Extenuante
Resistente, zeloso, tenaz.
Eagerly pressing or urgent; zealous; ardent; earnest; bold; valiant; intrepid; as, a strenuous advocate for national rights; a strenuous reformer; a strenuous defender of his country.
adj.energetic similar term adj, arduous, straining, effortful similar term
Vogais: euou
Consoantes: strns
streen, strein, strene, strewn, sistren, sterno-, sternum, styrene, sustren, southren.