self-deprecating

The word is a modern English compound formed from native and classical elements. The core component, "deprecate," originates from the Latin deprecari, meaning "to pray away (an evil)," from de- ("away") and precari ("to pray, entreat"). Its meaning evolved from "to pray for deliverance from" to "to express disapproval of" and finally to "to belittle." The prefix "self-" was added in English to create the reflexive adjective, specifying that the critical or belittling action is directed inward. Thus, the literal sense of "praying oneself down" transforms into the modern abstract meaning of humorously or modestly undervaluing one's own abilities or achievements.

Structure: self (own) + de (down) + precating (praying/entreating) self: Old English, meaning "one's own person." Acts as a prefix indicating reflexivity. de: Latin prefix, meaning "down, away, off." Here, it adds a sense of reduction or removal. precating: From the Latin verb precari, meaning "to pray, entreat, beg." In this compound, it forms the core concept of making a petition or plea.