Psalm 29:5 New English Translation

⁵The Lord’s shout breaks^[a] the cedars,
the Lord shatters^[b] the cedars of Lebanon.^[c]

Psalm 29:5 tn The Hebrew participial form draws attention to the durative nature of the action being described.
Psalm 29:5 tn The prefixed verbal forms with vav (ו) consecutive here and in v. 6a carry on the descriptive function of the preceding participle (see GKC 329 §111.u). The verb שָׁבַר (shavar) appears in the Qal in the first line of the verse, and in the Piel in the second line. The verb, which means “break” in the Qal, appears thirty-six times in the Piel, always with multiple objects (the object is either a collective singular or grammatically plural or dual form). The Piel may highlight the repetition of the pluralative action, or it may suggest an intensification of action, indicating repeated action comprising a whole, perhaps with the nuance “break again and again, break in pieces.” Another option is to understand the form as resultative: “make broken” (see IBHS 404-7 §24.3).
Psalm 29:5 sn The cedars of the Lebanon forest were well-known in ancient Israel for their immense size. Here they may symbolize the arrogant enemies of God (see Isa 2:12-13).

New English Translation (NET)