رُدْنٌ

The base (أَصْل) of the sleeve: (S, K:) [apparently meaning the part thereof that is next to the shoulder: but see what follows:] the fore part of the sleeve of the shirt: (M:) or the lower part thereof: (M, and Har pp. 149 and 390:) or the sleeve altogether: (M:) and it may tropically mean the whole garment: (Har p. 390:) plural أَرْدَانٌ. (S, M, K. [In the TA is added, and اردنة; as though another plural were أَرْدِنَةٌ: but I think that this is a mistake, originating in a copy of the M; for, immediately after أَرْدَانٌ, in the M, is added, وَأَرْدَنَهُ جَعَلَ لَهُ أَرْدَانًا; and I suspect that in some copy thereof, واردنه has been inadvertently written twice.]) You say قَمِيصٌ وَاسِعُ الرُّدْنِ [A shirt wide in the ردن]. (S.)

[Hence,] one says, هُوَ دَنِسُ الأَرْدَانِ (tropical:) [meaning He is foul in character, conduct, or the like; for it is tropical]. (A in article دنس. [See, there, other similar phrases.])