‘登基’ literally means ‘to ascend the base’—‘登’ (dēng) means ‘to climb or ascend’, and ‘基’ (jī) means ‘foundation’ or ‘base’. Historically, it refers to a new emperor formally taking the throne, stepping onto the imperial dais—the symbolic foundation of royal authority. The term evokes solemnity, legitimacy, and continuity of dynastic rule.

While rooted in imperial history, ‘登基’ is still used today in formal or literary contexts—not for modern political leaders (who ‘take office’ or ‘assume office’), but for monarchs like those in Japan, Thailand, or historical reenactments and documentaries. It’s rarely used in casual speech and carries strong connotations of tradition, ceremony, and hierarchy. You’ll find it in history textbooks, period dramas, and news reports about royal successions.