FA-4

('fa' in the fourth tone)

Some 15 standard Chinese characters have a 'fa' pronunciation. Sound-indicating character components are: 伐 (5 occcurences),   发 (3), 去 (3)

发 = hair on the head

More frequently encountered in combinations:

头发 = tou(2)fa(-) = hair on the head

For body hair:

毛 = mao (2)

美发 = go to the hairdresser, have a haircut