IPA: /ɪnˈsɪd.əntəl/
KK: /ɪnˈsɪdntl/
Happening as a minor or unexpected part of something else, often not planned or intended.
The incidental costs of the project were much higher than we anticipated.
A small or minor item, often related to expenses, that is not the main focus or purpose.
When traveling, it's important to budget for incidentals like snacks and tips.
Incidental is formed from "in-" (meaning not) and "cadere" (meaning to fall). The word describes something that does not fall within the main focus or is not essential, hence it is secondary or minor in nature.
Think of something that does not 'fall' ('cadere') into the main category — that's why incidental refers to something minor or secondary.