wei3 means 'tail'


wei3 can be seen to have the components  where the first denotes 'lower part of the body' and the second is the character mao meaning 'hair'. By extension it also means 'the remaining part'.

ma3wei3 means 'horse tail'

ma3 in its original script is  which is a clear graphical representation of a horse with long flowing mane.

wei3zhui1 means 'hot on the trail of' and literally translates as 'tail'-'chase'.

zhui1 has two components . The first component means 'distance' and the second component denotes 'a mound'. Curiously, although its modern meaning is 'chase', it originally meant 'to follow' i.e. 'up the mound in the distance'.