كايسهُ

, (S, A, K,) verbal noun مُكَايَسَةٌ, (TA), He vied, or contended, with him in كَيْس [i. e. acuteness or sharpness or quickness of intellect; &c.: see 1]. (K.) You say, كَايَسْتُهُ فَكِسْتُهُ [I vied, or contended, with him in acuteness, &c., and] I overcame, or surpassed, him (S, A) [therein, i. e.] in كَيْس. (A.) And كَايَسَهُ فِى البَيْعِ (S, A) [He vied, or contended, with him in acuteness, &c., in selling; as seems to be indicated in the S: or] he jested, or joked, with him (لَاغَاهُ) in selling. (A, TA.)