Şin-Dal-Dal: to bind tightly, strap, strengthen firmly, run, establish, make firm, hard, strong, be advanced (day), be intense. ushdud - harden, strengthen. shadiid (pl. shidaad & ashidda'u - great, firm, strict, vehement, strong, violent, severe, mighty, terrible, stern, grievous, miserly, niggardly. (adj. of the forms fa'iil and fiaal are used indifferently for both m. and f.): ashuddun: age of full strength, maturity. ishtadda (vb. 8) - to act with violence, become hard.