רָאִ֙יתִי֙ הֶֽהָרִ֔ים וְהִנֵּ֖ה רֹעֲשִׁ֑ים וְכָל־הַגְּבָע֖וֹת הִתְקַלְקָֽלוּ׃
Tumingin ako sa mga bundok, at narito, sila ay nayayanig; at ang lahat ng burol ay nagugulo at napapalis sa kanilang kinalalagyan.
Chizkuni
הקלוקל, as in Ezekiel 21,26: קלקל בחצים, “like flashing arrows,” a simile for the word בדולח, “shining crystal,” a word used by the Torah to describe the appearance of the manna in Numbers 11,7. An alternate interpretation: the word is a variation of קלקול, as in Jeremiah 4,24: וכל הגבעות התקלקלו, “and all the heights, (low hills) are disintegrating.” They are not providing man with strength.
Rashi
he flashed with the arrows Menachem (p. 155), connected it with (above 1:7): “burnished (קָלָל) copper”; (Ecc. 10:10): “and he did not sharpen (קִלְקֵל) the edge.” It may also be explained as an expression of deterioration, as in (Jer. 4:24): “and all the hills deteriorated (הִתְקַלְקָלוּ).” Some translate קִלְקַל into French, as trait, he shot, and Jonathan as well renders קִלְקַל בֲּחִצִים as קְשֲּׁתבְּגִרְרֲיָא.