The word **径直** is a Chinese adverb formed through the combination of two synonymous or semantically reinforcing morphemes (characters) in a **parallel compound** structure. The character **径** originally means a small, direct footpath or shortcut, implying a straight and unobstructed route. The character **直** means "straight" or "direct." When combined, their meanings converge and amplify to form a single lexical unit that means "directly," "straight," or "without hesitation or diversion," both in a literal spatial sense (e.g., walking straight ahead) and a figurative sense (e.g., proceeding straight to a point without digression). This process of compounding, where two elements with related meanings merge to create a word with a nuanced or reinforced concept, is a common and productive method of word formation in Chinese.