The Chinese character 亠
tóu is the lid. 匸
xìenclose
/ cover, 心 xīn heart
A heart 心
xīn that
is enclosed / covered 匸
xì with a lid 亠
tóu忘 wàng forgets / neglects.
See also 亠
tóu lid and 匸
xì cover with eye目mù. 口
kǒu mouth, 冖
mì cover and 丁
dīng Stacking the
above and covering them with a lid, one gets a pavilion 亭 tíng.