ثَعْبٌ
1.
, applied to water, (K,) and to blood, (TA,) Flowing, running, or streaming; as also
ثَعَبٌ and
أُثْعُوبٌ and
أُثْعُبَانٌ. (K, TA.) You say
سَيْلٌ أُثْعُوبٌ [A flowing torrent]. (A.)
2.
And [hence,]
شَرٌّ أُثْعُوبٌ (tropical:) [Evil that takes its course like a stream]. (A.)
3.
See also what next follows.