首页

power-on

UK[ˈpaʊər ɒn]US[ˈpaʊər ɑːn]
adj

Describing the state of an electronic device when its main electrical supply is switched on and it is operational.

n

The act or process of switching an electronic device on.

Morpheme Breakdown

power
on
power

to be able

on

Etymology

The compound "power-on" is a modern technological term formed by combining two native English elements. The noun "power," with its deep roots in the Latin concept of ability and control, was adopted into English to denote force and energy, especially electrical. The preposition/adverb "on," with ancient Germanic origins signifying position and contact, evolved to indicate an active or operational state. Their union in the mid-20th century logically creates a term that literally means "to put electrical power into a state of contact or operation," perfectly describing the act of starting an electronic device. This reflects a common pattern in English where simple, native words are combined to name new technological functions.

Analysis

Structure: power + on - power: From Middle English 'pouer', from Anglo-Norman 'poer', from Vulgar Latin 'potēre', from Latin 'posse' meaning "to be able". In this compound, it functions as the core noun denoting electrical energy or force. - on: From Old English 'on', of Germanic origin, related to Dutch 'aan' and German 'an'. In this compound, it functions as an adverbial particle indicating the activation or connection of a state.

Examples

Please wait for the power-on self-test to complete before using the computer.

The power-on indicator light is green.

A slow power-on sequence can sometimes indicate a hardware problem.

power-on – Meaning, Etymology & Word Origin | OpenEtymology