ارتأس الشَّىْءَ
1.
He, or it, became mounted, or fixed, upon the head of the thing. (M, TA. *) In the saying, يَرْتَاسُ السِّنَانَ فَيُقْتَلُ [He becomes fixed upon the point of the spear-head, and is slain], in a verse cited by Th, يَرْتَاسُ is for يَرْتَيءِسُ. (M.)
2.
See also 5.
3.
ارتأس زَيْدًا
He took Zeyd by the neck, and lowered it to, or towards, the ground. (K, from the “ Nawádir el-Aaráb. ”)
4.
Hence, (assumed tropical:) He occupied Zeyd so as to divert his attention: (K, from the same:) and اِكْتَاسَهُ and اِرْتَكَسَهُ and اِعْتَكَسَهُ also signify the same [apparently in the former sense, or perhaps in both senses.] (TA, from the same.)