ترس1 تَرَسَ البَابَ, aor. ـُ inf. n. تَرْسٌ, He fastened, or closed, the door [with a bar or] in any manner. (TA.) 2 ترّس, inf. n. تَتْرِيسٌ, He made a person to arm himself with a shield. (KL.) A2:  See also 5.5 تترّس, (S, A, K,) or تترّس بِتُرْسٍ, (M,) He defended himself with a تُرْس [or shield]; (S, M, A, * K;) as also ↓ ترّس, inf. n. تَتْرِيسٌ; (S, K;) and ↓ اِتَّرَسَ, (Sb, M, A, TA,) inf. n. اِتِّرَاسٌ, of the measure اِفْتِعَالٌ: (TA:) and تترّس بِشَىْءٍ he made a thing to be as a تُرْس; he defended, or protected, himself with it. (Msb.) You say also, تَسَتَّرْتُ بِكَ مِنَ الحَدَثَانِ فَتَتَرَّسْتُ مِنْ نِبَالِ الزَّمَانِ (tropical:)  [I protected myself by thee from calamities, and so shielded myself from the arrows of fortune]. (A.) and أَخَذَتٌ إِبِلِى سِلَاحَهَا وَتَتَرَّسَتْ بِتُرْسِهَا, meaning (tropical:)  My camels became fat and goodly, and prevented their owner from slaughtering them. (A, TA.) [See سِلَاحٌ.]8 إِتَّرَسَ see 5.تُرْسٌ [A shield;] a certain piece of defensive armour; (M, TA;) a thing well known: (A, Msb, K:) pl. تِرَسَةٌ and تِرَاسٌ (S, M, Msb, K) and تِرَاسَةٌ (S) and تُرُوسٌ, [all pls. of mult.,] and أَتْرَاسٌ, [a pl. of pauc.,] (S, M, Msb, K,) but not أَتْرِسَةٌ. (ISk, S, Msb.) A تُرْس that is made of skins, without wood and without sinews in it, is called حَجَفَةٌ and دَرَقَةٌ. (Msb.) b2:  Also (tropical:)  The disk of the sun. (A, * TA.) b3:  And (tropical:)  A smooth, round, level piece of ground: (A, TA:) or a rugged piece of hard, or hard and level, ground. (Ibn-'Abbád, K.) b4:  See also مَتَرْسٌ.تِرَاسَةٌ The art of making shields. (K.) تَرَّاسٌ A man having a shield; (S, M, A, K;) as also ↓ تَارِسٌ. (S, A.) b2:  And A maker of shields. (K.) تَارِسٌ: see تَرَّاسٌ.مَتَرْسٌ; so accord. to El-Háfidh Ibn-Hajar, and this is the correct form; written in the T and the Towsheeh مَتَّرْسٌ; and by some, مَتْرَسٌ [as in the CK]; and by some, مَتْرَسٌ [as I find it in two copies of the S and in a copy of the K]; (TA;) [A wooden door-bar;] a piece of wood that is put behind the door; (S, K) the شِجَار [or wooden bar] that is put against the door as a stay: (T, L, TA:) [مَتَرْسْ is] a Persian word, [having the above-mentioned signification, but originally a contraction of مَهْ تَرْسْ, and] meaning “ fear not thou,” with it [being here understood]: (T, K, TA:) or the name of this piece of wood in Arabic is ↓ تُرْسٌ: (M, TA:) which also signifies a piece of wood with which a couch-frame (سَرِير) is repaired, by its being affixed as a ضَبَّة: (M:) [and the Arabic word شِجَارٌ has this latter signification also:] the Persian word is مَتَرْسْ. (M, TA.) b2:  Their saying مَتَرْس, with fet-h to the م and ت, and sukoon to the ر means [also] Security  [is given] to thee, therefore fear thou not: it is said to be Persian. (Msb.) مَتْرَسَةٌ, (M, A,) or متْرَسَةٌ, (K, accord. to the TA, [and so I find in a MS. copy of that work, and in the CK, but the former is probably the correct form, being agreeable with analogy, like مَبْخَلَةٌ and مَجْبَنَةٌ &c.,]) Anything by which one is defended, or protected. (M, Msb, K.) Yousay also هُوَ مَتْرَسَةٌ لَكَ (tropical:)  [He is a cause of defence, or protection, to thee]. (A.) بَابٌ مَتْرُوسٌ A door fastened, or closed, [with a bar, or] in any manner. (TA.)