JIN

There are several important characters that are spoken 'jin', which have no graphic relationship to each other. 井 = jing(3) = well (for water) is sound-determining in some, and so is 斤 = jin(1) =  500 gram.

jin(1)

金 = gold

今 = present

巾 = piece of cloth

斤 = a traditional weight, now 500 gram; vegetables, fruit, and meat is typically quoted as in

斤 in China; thus, this remains an important character

jin(2)

jin(3)

紧 = tight, close (to each other)

不要紧 = bu(4) yao(4) jin(3) = it doesn't matter

jin(4)

进 = to come in

近 = near