Abarim Publications' online Biblical Hebrew Dictionary
The verb כאה (ka'a) means to be disheartened or cowed. The verb is comparable to words found in Arabic but in the Bible it's used a mere three times: Daniel 11:30, Psalm 109:16 and Ezra 13:22. It also yields one derivative: the adjective כאה (ka'eh), meaning cowed. This word occurs only once, in Psalm 10:10.