The antonyms for the term "outward-developing" include "inward-stagnant," "internal-declining," and "inner-obsolete." These words signify the opposite of the compound adjective "outward-developing," which means a condition of constant growth, progress, and expansion. In contrast, the antonyms describe a state of being stagnant, regressive, and diminishing. The term "inward" denotes aspects related to internal events, thoughts, and conditions, while the words "stagnant," "declining," and "obsolete" reflect situations that lack growth or improvement. Employing these antonyms helps in contextualizing words to convey contrasting meanings in writing or communication.