IPA: /kəˈstoʊdiəl/
KK: /kʌˈstoʊdiəl/
Relating to the care, supervision, or guardianship of someone or something, often in the context of children or maintenance duties.
The custodial staff ensures that the school is clean and safe for the students.
Custodial → It is formed from "custodia" (meaning custody or protection) and the suffix "-al" (meaning relating to). The word "custodial" refers to something that relates to the act of keeping or protecting.
Think of 'custody' which means protection or care, and remember that 'custodial' relates to the act of keeping or protecting something.
No commonly confused words.