Which term best describes the act of speaking out forcefully against injustices faced by the elderly?

Inveigh is the term that most accurately captures the act of speaking out forcefully against injustices faced by the elderly. This verb commonly means to protest or complain vehemently, often involving strong verbal disapproval or criticism. When someone inveighs against injustices, they express their passionate opposition to what they perceive as wrong, typically in a vigorous and articulate manner. This aligns well with the context of advocating for the rights and dignity of the elderly, emphasizing a call to action against their mistreatment or neglect.

The other terms do not fit this context. Ingratiate refers to the act of trying to gain favor or approval, often through flattery, which contradicts the idea of forcefully opposing injustice. Surmise means to conjecture or assume something without sufficient evidence, lacking the strong vocal opposition implied in the question. Callow describes someone who is inexperienced or immature, which does not relate to the forceful expression of dissent. Thus, inveigh stands out as the most appropriate choice for articulating a strong stance against injustices faced by the elderly.