考究 (kǎo jiū) is a compound word where 考 means 'to examine' or 'to test', and 究 means 'to investigate thoroughly' or 'to seek the root cause'. Together, they convey careful scrutiny—either as a verb meaning 'to examine meticulously' or as an adjective meaning 'refined', 'fastidious', or 'meticulously crafted'. As a verb, it often appears in formal or literary contexts, such as academic research or quality control. As an adjective, it describes objects, styles, or behaviors marked by attention to detail and high standards—e.g., clothing, interior design, or etiquette.

The word carries a slightly elevated register: it’s common in written Chinese and formal speech but less frequent in casual conversation. It implies both intellectual rigor (when used verbally) and aesthetic or functional excellence (when used adjectivally). Unlike simpler synonyms like 认真 (serious), 考究 suggests deeper layers of analysis or craftsmanship—not just care, but discernment and refinement.