مُتَمَرَّسٌ
1.
[originally A place where one rubs or scratches himself against a thing. Hence, apparently, the saying,]
2.
مَا بِفُلَانٍ مُتَمَرَّسٌ (tropical:) [Nothing can be done with, or got from, such a one]: said of him from whom the enemy can obtain no advantage: (A:) or of him who is hardy and strong, so that he who strives with him cannot withstand him, because he has striven against calamities and contentions: (TA:) and of the avaricious man, from whom he who is in want cannot obtain anything. (A, TA.)