idle / idol / idyll are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
idle: (noun) the state of an engine or other mechanism that is idling. (verb) run disconnected or idle. (verb) be idle; exist in a changeless situation. (adjective) not in action or at work. (adjective) not in active use. (adjective) silly or trivial. (adjective) lacking a sense of restraint or responsibility. (adjective) not having a job.
idol: (noun) a material effigy that is worshipped. (noun) someone who is adored blindly and excessively.
idyll: (noun) an episode of such pastoral or romantic charm as to qualify as the subject of a poetic idyll.
idle: AY·d·ah·l
idol: AY·d·ah·l
idyll: AY·d·ah·l
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)