Easy-to-use

adj.capable, calmeveryday

What it means

Simple to understand and operate without unnecessary effort or training.

Reach for it when praising a tool whose interaction is straightforward for its intended users

The easy-to-use recorder let volunteers capture interviews after a short briefing.

playful
plug-and-play
when setup is nearly immediate in a technical context
not when Plug-and-play concerns installation and does not guarantee pleasant everyday operation.
everyday
straightforward
when the steps are clear and uncomplicated
not when A straightforward process can still take considerable time or physical effort.
warm
beginner-friendly
when newcomers can succeed with little prior knowledge
not when Beginner-friendly can undersell advanced capability or sound patronizing to experts.
professional
accessible
when disabled people can perceive and operate the tool
not when Accessible is a stronger, testable claim and is not a synonym for merely simple.
professional
intuitive
when the controls match familiar expectations
not when Intuitive often means familiar to the designer and should not replace observed user evidence.
professional
user-friendly
when design supports comfortable, intuitive interaction
not when User-friendly is a broad claim and may hide accessibility problems for particular users.
literary
effortless
when polished interaction genuinely feels almost frictionless
not when Effortless is absolute marketing language and rarely fits a tool with any learning curve.

easy-to-use interface
The easy-to-use interface keeps the three main actions visible.
easy-to-use tool
An easy-to-use tool helped teachers prepare captions themselves.
simple and easy-to-use
The radio is simple and easy-to-use without sacrificing clear sound.

Ease of use depends on the intended users and tasks; the label should follow testing rather than substitute for it.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.