point - “the whirling glance of the sword” [Fairbairn]. “The naked (bared) sword” [Henderson].
ruins - literally, “stumbling-blocks.” Their own houses and walls shall be stumbling-blocks in their way, whether they wish to fight or flee.
made bright - made to glitter.
wrapped, etc. - namely, in the hand of him who holds the hilt, or in its scabbard, that the edge may not be blunt when it is presently drawn forth to strike. Gesenius, translates, “sharpened,” etc.