Second dawn: true daylight spreading across the horizon.
Zawal: the sun's movement past its high point.
Fay’ al-zawal: the baseline shadow still present at noon.
Mithl / mithlayn: an additional shadow of one / two object lengths.
Red shafaq: redness after sunset. White shafaq: residual whiteness after red twilight.
Isfar / ibrad / ta‘jil: prayer after dawn has brightened / delaying Dhuhr in heat / performing promptly.