7-Letter Words Containing: TRI

• having three units or components or elements

• change into glass or a glass-like substance by applying heat

• undergo vitrification; become glassy or glass-like

• marked by skill in deception

• A governess; a rectoress.

• A flight feather on the tails of birds, used for directional control.

• The covert of a bird's wing

• cause to become stonelike or stiff or dazed and stunned from fright

• change into stone

• make rigid and set into a conventional pattern

• compose in poetic meter

• convert from a non-metric to the metric system