tributary

adj 1 ~ (to sth) (of a river or stream) flowing in this way （指河川）支流的: rivers tributary to the Thames 泰晤士河的支流. 2 [attrib 作定语] (of a country or ruler) paying tribute(3) to another （指国家或统治者）纳贡的, 进贡的.

trephine, trepidation, trespass, trespasser, tress, trestle, trestle-table, trews, tri-, triad, trial, trial run, triangle, triangular, tribal, tribalism, tribe, tribesman, tribulation, tribunal, tribute, trice, triceps, trick, trickery, trickily, trickiness, trickle, trickle charger, trickster, tricky, tricolour (US tricolor), tricycle, trident, tried, triennial, triennially, trier, trifle, trifler,