301 囗+大【dà】=因【yīn】（象形/假借）

一个人躺在褥子上的样子。本义为裀（褥子）。“裀”，假借为虚字“因”。

A man is lying on a mattress. The original meaning is mat.（褥子）“裀”under the guise of “因”.

①因为【yīnwéi】<conj>because of; as result of

因为【yīnwéi】<conj>because; for; on account of

因此【yīncǐ】<conj>therefore; for this reason; consequently

※因而【yīn'ér】<conj>thus; as a result; with the result that

②※原因【yuányīn】<n.>cause; reason

※成因【chénɡyīn】<n.>cause of formation; contributing factor

※内因【nèiyīn】<n.><philosophy> internal cause

※因素【yīnsù】<n.>factor; element

※因特网【yīntèwǎnɡ】<n.>internet