deteriorating
adj. B2 Upper Intermediate US //dɪˈtɪɹiɝˌeɪtɪŋ// UK //dɪtˈiəɹiəɹˌeɪtɪŋ// de·te·ri·o·rat·ing
adj. becoming worse in quality, health, or strength over time.
adj. becoming progressively worse in quality, state, or condition. Often used predicatively after linking verbs like 'be' or 'seem', or attributively to describe a declining situation.
The weather is deteriorating quickly.
Doctors are monitoring the patient closely because his breathing is deteriorating despite the new medication.
The deteriorating condition of the historic bridge forced the city council to close it to all heavy traffic until major structural repairs could be completed.
Usage
Participial adjective — often follows 'be', 'become', or 'seem'.