五 Wǔ is 'five':


It does rather look like 5.

语 Yǔ is 'word, language':

It is frequently used as a suffix to indicate languages e.g. 英语 yīngyǔ 'English'.
The element on the left is a form of 言 yán 'words'.

悟 Wù is 'enlightenment':

The element on the left is a form of 心 xīn 'heart'.