The word Sikh is derived from the word sisya meaning disciple or follower. Sikhism is a religion of ten Gurus, the first Guru being Guru Nanak and the tenth and the last being Guru Gobind Singh. The sacred book of Sikhism is Sri Guru Granth also called Adi Granth Sahib.
THE FIVE Ks
Every Sikh is supposed to keep the following five Ks, which also serve to identify him as a Sikh:
Kesh uncut hair.
Kanga comb; used to keep the hair clean.
Kada metal or steel bangle; for strength and self-restraint.
Kirpan dagger; for self-defence.
Kaccha special knee length underwear or under-drawer for agility.