Burdensome or difficult to bear. / Tyrannical or exercising unjust power. / Weighing heavily on the spirit; intense, or overwhelming / Hot and humid of the weather.

plural of scale leaf

(dated) A shoehorn. / (obsolete) Anything that facilitates a transaction; that which smooths the way or greases the wheels.

Any virus (such as Tobacco mosaic virus) of the genus Tobamovirus.