diminishing

(verb) decrease in size, extent, or range. Synonyms: decrease, diminish, lessen, fall. Examples: "The amount of homework decreased towards the end of the semester." "The cabin pressure fell dramatically." "Her weight fell to under a hundred pounds." "His voice fell to a whisper."

(verb) lessen the authority, dignity, or reputation of. Synonyms: diminish, belittle. Example: "Don't belittle your colleagues."

(adj) becoming smaller or less or appearing to do so. Examples: "Diminishing returns." "His diminishing respect for her."