sustain verb
ADV. long The soil was so badly eroded it could no longer sustain crop production. | indefinitely | still
VERB + SUSTAIN be able/unable to, can/could | help (to) | be difficult to, be hard to, be impossible to This relationship would be very difficult to sustain.
You can also check other dicts: sustain (English, 中文解释 ), wordnet sense, Collins Definition