hummˈable adjective

hummˈer noun

1. A person or thing that hums, such as a bee, a hummingbird, or a top
2. A person who makes things hum (see below)

hummˈing noun and adjective

humming ale noun

Ale that froths up well, or that makes the head hum

hummˈingbird noun

Any member of the tropical family Trochilidae, very small birds of brilliant plumage and rapid flight (from the humming sound of the wings)

hummˈing-top noun

A top that produces a humming sound as it spins

hum and haw or hum and ha

1. To make inarticulate sounds when at a loss
2. To shilly-shally

make things hum

To set things going briskly