Dangerous/ as a bear robbed/ very embittered and dangerous
By metaphor: a dangerous matter (like a bear whose relative has died).
(One who meets a bereaved bear is better than a fool in his folly - Proverbs 17:12)
Translation
Expression (Hebrew)
דֹּב שַׁכּוּל, כְּדֹב שַׁכּוּל
Definition (Hebrew)
בְּהַשְׁאָלָה: דָּבָר מְסֻכָּן (כְּמוֹ דֹּב שֶׁמֵּת לוֹ קְרוֹבוֹ).
("פָּגוֹשׁ דֹּב שַׁכּוּל בְּאִישׁ וְאַל כְּסִיל בְּאִוַּלְתּוֹ"- מִשְׁלֵי יז יב)