The compound word 大肆 (dàsì) is formed through the combination of the character 大 (dà), meaning "big" or "great," and 肆 (sì), which in classical Chinese carries the meaning of "to be unrestrained," "to act wantonly," or "to spread out extensively." Together, they create an adverbial expression where 大 acts as an intensifier, amplifying the core meaning of 肆. Thus, the term semantically fuses to convey the notion of "without restraint," "recklessly," or "on a grand scale," typically describing the carrying out of an action (often negative) in an excessive, unreserved, and bold manner. Its formation follows a common pattern in Chinese where an adjective modifies a verb-oriented morpheme to denote the manner or degree of an action.