联系 (liánxì) is a versatile word meaning both 'to contact' (as a verb) and 'relationship' or 'connection' (as a noun). The character 联 (lián) means 'to join' or 'to link', while 系 (xì) means 'to tie' or 'system'; together, they evoke the idea of binding things — people, ideas, or information — into a meaningful connection. As a verb, it’s commonly used for initiating communication (e.g., calling, messaging, emailing someone). As a noun, it refers to an interpersonal relationship, a professional network, or even a logical link between concepts.

This word appears frequently in daily life: students use it when asking for a teacher’s contact info, colleagues say 联系方式 (contact details), and sociologists discuss social ties as 人际关系 (interpersonal relationships). It’s neutral in register — appropriate in formal reports and casual chats — and rarely used without context; you’ll usually see it with modifiers like 电话联系 (phone contact) or 保持联系 (keep in touch).