High Quality Content by WIKIPEDIA articles! Terengganuis a sultanate and constitutive state of federal Malaysia. The state is also known by its Arabic honorific, Darul Iman ("Abode of Faith"). The coastal city of Kuala Terengganu which stands at the mouth of the broad Terengganu River is both the state and royal capital as well as the largest city in Terengganu.There are several theories on the origin of the name 'Terengganu'. One theory attributes the name's origin to terang ganu, Malay for 'bright rainbow'.