سُوَيْدٌ

the abbreviated diminutive of أَسْوَدُ: (S, Mgh, Msb:) see the latter.

Also [as a subst., or an epithet in which the quality of a subst. predominates,] Water; (M, Mgh, L;) as also ↓ أَسْوَدُ: (M: [but see الأَسْوَدَانِ, voce أَسْوَدُ:]) the former is [said to be] used in this sense in negative phrases only: (M, L:) one says, مَاسَقَاهُمْ مِنْ سُوَيْدٍ قَطْرَةً He gave them not to drink a drop of water. (M, Mgh, * L.)

أُمُّ سُوَيْدٍ means The anus; synonym الاِسْتُ; (K;) [and] so ↓ السُّوَيْدَاءُ. (M.)