The abstract nouns "expression" and "complaint" can be translated as the verbs "express" and "complain." AT: "I will freely express what I have to complain about" or "I will argue freely" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
How Job feels is compared to a bitter taste. The abstract noun "bitterness" can be translated as the adverb "bitterly." AT: "My inner being will speak bitterly" or "I will bitterly speak out" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-abstractnouns]])