نَقَعَ

and ↓ اِسْتَنْقَعَ It (water) remained, or stagnated, or collected, in a hollow, or cavity: (Mgh:) or remained long, and became altered: (Msb:) or the former [and latter] collected in a مَنْقَع: (S:) or the latter [and former] became yellow and altered. (K.)

نَقَعَ and ↓ أَنْقَعَ [He macerated, steeped, or soaked, a medicine, in water,] he left it in water until its colour became changed. (Msb.)