تمارسوا

[They laboured, strove, struggled, contended or conflicted, one with another, to prevail, overcome, gain the mastery, or effect an object:] they contended together, smiting one another, synonym تَضَارَبُوا, (A, K,) فِى الحَرْبِ in war: (A:) and [in like manner] you say also, ↓ تمرّسوا فى الحرب, (K in art دعك,) or, of two men, تمرّسا فى الحرب. (S in that article)

تَمَارَسَا الشَّرَّ بَيْنَهُمَا [They two laboured, or strove, each with the other, to do evil, or mischief]. (S, article كوح.)