c.1225,
triws, variant of
trewes, originally plural of
trewe "faith, assurance of faith, covenant, treaty," from O.E.
treow "faith, treaty," from P.Gmc.
*trewwo (cf. O.Fris.
triuwe, M.Du.
trouwe, Du.
trouw, O.H.G.
triuwa, Ger.
treue, Goth.
triggwa "faith, faithfulness"). Related to O.E.
treowe "faithful" (see
true). The Gmc. word was borrowed into L.L. as
tregua, hence Fr.
trève, It.
treuga.
Trucial States, the pre-1971 name of the United Arab Emirates, is attested from 1891, in ref. to the 1835 maritime truce between Britain and the Arab sheiks of Oman.
[troos] 
,