In a useless manner. / To no useful purpose.

(chiefly computing) Designed to be easy for an untrained user to use, with intuitive ordering of steps, consistent and logical placement of controls, etc.

The quality of being user-friendly.

(archaic or nonstandard) past participle of use

A person who is injured or disabled and uses a wheelchair, usually long-term.

Alternative spelling of user-friendly

(Internet) A communications protocol that has no error recovery features, and is mostly used to stream material over the Internet.

Difficult to use, especially for an untrained user.

Misspelling of usage.

Misspelling of usages. (plural of useage)