EN、En、eN或en可以指：

• En、N，拉丁字母
• Н（н），西里尔字母，对应拉丁字母n。
• En (二合字母)，拉丁二合字母
• En (字体排印学)，字体排印学中的宽度单位，相当于指定字体行高的一半。（参见en dash）
• En (李代数) - 李代数E_n的一员，对应n=5..8。

Ensí (spelled PA.TE.SI, , in Sumerian cuneiform, hence occasionally transliterated as patesi; possibly derived from <en si-k>, "lord of the plowland"; borrowed into Akkadian as iššakkum) is a Sumerian title designating the ruler or prince of a city state. Originally it may have designated an independent ruler, but in later periods the title presupposed subordinance to a lugal (King/Emperor).