Thou shouldest not. Verses 12-14 relate, in vivid poetic structure, the unfeeling conduct of Edom against Judah.
Have looked. That is, with malicious satisfaction.
Became a stranger. This phrase translates a single Hebrew word, neker, perhaps better translated “misfortune.” The complete phrase would then read, “in the day of his misfortune.”
Spoken proudly. Literally, “enlarged thy mouth,” possibly in boastful talk. An ascending climax has been observed in this verse: first, the satisfied look, then the malicious joy, and lastly the exulting expression of boastfulness and insulting derision.