研发 (yán fā) is a compound noun meaning 'research and development' — the process of investigating new ideas and turning them into practical products or technologies. The character 研 (yán) means 'to study, to research', often implying careful, systematic investigation; 发 (fā) means 'to develop, to bring forth', suggesting creation, innovation, or implementation. Together, they form a standard abbreviation widely used in business, technology, education, and government contexts in Chinese-speaking regions.

This term is almost exclusively used as a noun and commonly appears in formal or professional settings — for example, in company departments ('R&D department'), funding announcements ('R&D investment'), or policy documents ('national R&D strategy'). It is rarely used as a verb on its own; instead, verbs like 进行研发 (jìnxíng yánfā, 'to conduct R&D') or 开展研发 (kāizhǎn yánfā, 'to carry out R&D') are preferred. While the characters individually have broader meanings, 研发 functions as a fixed, unbreakable unit in modern usage.