trigonometric, trigonometrical

adjs.

trickery, trickily, trickiness, trickle, trickle charger, trickster, tricky, tricolour (US tricolor), tricycle, trident, tried, triennial, triennially, trier, trifle, trifler, trifling, trigger, trigger-happy, triglyceride, trigonometrically, trigonometry, trike, trilateral, trilaterally, trilby, trilingual, trill, trillion, trillionth, trilobite, trilogy, trim, trimaran, trimmer, trimming, trinitrotoluene, trinity, Trinity Sunday, trinket,