Thou art beautiful. Solomon breaks in as soon as the Shulamite called for her beloved (shepherd), as he did in Song of Solomon 1:9.
my love. my friend. Hebrew. ra'yah. Feminine. See note on Song of Solomon 1:9.
Tirzah. Became the royal residence of the kings of Israel after the division of the kingdom, until Omri built Samaria (1 Kings 14:17. 1Ki 15:21, 1 Kings 15:33; 1 Kings 16:8; 1 Kings 16:15; 1 Kings 16:17). Compare Son 16:24. Tirzah means "delightful". Hence the flattering comparison.
terrible, &c.. majestic, or awe-inspiring, as bannered hosts.