ثنى

ثِنَايَةٌ ثنايه ثناية A cord, or rope, of goats' hair (شَعَر), or of wool, (S, K,) or of other material; (K;) as also ↓ ثِنَاآءٌ (K) and ↓ مِثْنَاةٌ and ↓ مَثْنَاةٌ; (M, K;) which last is explained by IAar as signifying [simply] a cord, or rope: (M:) [or] the first has the meaning assigned to it above, voce ثِنَاآءٌ; syn. with ثِنَايَانِ: and signifies also a long rope; whence the saying of Zuheyr, describing the [she-camel termed] سَانِيَة, تَمْطُو الرِّشَاآءَ وَتُجْرِى فِى ثِنَايَتِهَا مِنَ المَحَالَةِ قَبًّا رَائِدًا قَلِقَا (T,) meaning [ She draws the well-rope, and causes to run, ] with her ثناية upon her, (ISk, T,) [ a wabbling, unsteady, sheave (?) of the large pulley; ] the ثناية here being a rope of which the two ends are tied to the saddle (قَتَب) of the سانية; the [ upper ] end of the well-rope being tied to its ↓ مِثْنَاة [which here means the folded middle part ]: (T:) but Aboo-Sa'eed says that it [here] means a piece of wood by which are connected the two extremities of the cheeks, or side-pieces, (طرفا الميلين, [the latter of which words I here render conjecturally, supposing it to be similar in meaning to القَعْوِ or القَعْوَيْنِ,]) above the محالة, and a similar piece below; the محالة and [qu. or ] the sheave turning between the tow pieces thus called. (T, in a later portion of the art.)