IPA: /ˌʌndərˈiːt/
KK: /ʌndərˈit/
To consume less food than is necessary or healthy.
Many people undereat when they are stressed or anxious.
Past: undereat
Past Participle: undereaten
Undereat is formed from "under-" (meaning below or insufficiently) and "eat" (meaning to consume food). The word describes the act of consuming less food than is necessary or normal.
Think of 'under' meaning insufficient and 'eat' meaning to consume. This helps you remember that 'undereat' means to eat less than what is needed.