رتك1 رَتَكَ, (S, K,) aor. ـُ (S,) thus it appears to be accord. to the K [also], and thus in the Deewán el-Adab of El-Farábee, but accord. to Sgh it is correctly رَتِكَ, (TA,) inf. n. رَتْكٌ and رَتَكَانٌ (S, K) and رَتَكٌ, (K,) He (a camel) went with short steps (S, K) in his رَمَلَان [or quick pacing, or going a kind of trotting pace, between a walk and a run], (S,) to which Kh adds, shaking himself: and accord. to him, and J, it is said only of a camel: but it is sometimes said of other animals, [perhaps tropically, or improperly,] as, for instance, of an ostrich: and accord. to Sgh, it is sometimes said of a human being. (TA.) [See also حَتَكَ: and see نَصَبَ السَّيْرَ, in art نصب.]4 ارتكهُ He made him (namely, a camel,) to go in the manner expl. above: (S, K:) or made him to go a quick pace. (TA.) b2:  And ارتك الضَّحِكَ (assumed tropical:)  He laughed languidly: (K:) and so أَرْتَأَ الضَّحِكَ. (TA.) رَاتِكَةٌ A she-camel [going with short steps &c.: (see 1:) or] going as though she had shackles on her legs: or beating [the ground] with her fore legs: (As, TA:) pl. رَوَاتِكُ. (TA.) مَرْتَكٌ i. q. مُرْدَاسَنْجٌ [from the Pers\. مُردَاسَنْگ, both of which signify Litharge in the present day, as in the classical dialect]: (K:) it is of two kinds; namely, ذَهَبِىٌّ [i. e. red, or of gold], and فِضِّىٌّ [i. e. white, or of silver]. (TA.)