阻碍 (zǔ’ài) is a compound word meaning 'to hinder' or 'to obstruct' when used as a verb, and 'obstacle' or 'hindrance' when used as a noun. The first character 阻 (zǔ) means 'to block' or 'to impede', while the second character 碍 (ài) means 'to interfere with' or 'to trouble'. Together, they emphasize active interference that slows down or prevents progress — often in contexts like development, communication, health recovery, or policy implementation. It carries a formal, slightly negative connotation and is common in written Chinese and official discourse.

This word frequently appears in abstract or systemic contexts — for example, describing barriers to economic growth, medical treatment, or social reform. As a noun, it’s often preceded by measure words like '一个' or modifiers like '主要' (main) or '严重' (serious). Unlike more colloquial verbs like 挡 (dǎng) or 卡 (kǎ), 阻碍 sounds measured and objective, making it suitable for news reports, academic writing, and official statements.