致谢 is a formal verb meaning 'to extend thanks' or 'to express gratitude', typically used in written or ceremonial contexts. The character 致 (zhì) means 'to deliver, to present, or to direct toward', while 谢 (xiè) means 'to thank' or 'to express gratitude'. Together, they form a compound verb emphasizing the deliberate, respectful act of conveying thanks—not just feeling it, but actively offering it. This word carries a tone of sincerity and solemnity, often appearing in speeches, prefaces, acknowledgments, or official letters.

Unlike everyday expressions like 谢谢 (xiè xie) or 感谢 (gǎn xiè), 致谢 is rarely used in casual conversation. It’s common in academic papers (e.g., '致谢部分'), graduation ceremonies, award acceptance speeches, or public announcements where formal recognition is expected. Its usage signals respect for the recipient and underscores the gravity of the gratitude being conveyed.