underfeed

US: (un′dər fēd′ for 1; un′der fēd′ for 2)

Inflections of 'underfeed' (v): (⇒ conjugate)

underfeeds

v 3rd person singular

underfeeding

v pres p

underfed

v past

underfed

v past p

WordReference Random House Unabridged Dictionary of American English © 2025

un•der•feed  (un′dər fēd′ for 1; un′der fēd′ for 2), v.t., -fed, -feed•ing. 

1. to feed insufficiently.
2. to feed with fuel from beneath.

• under- + feed 1650–60

Collins Concise English Dictionary © HarperCollins Publishers::

underfeed verb / ˌʌndəˈfiːd/ ( -feeds, -feeding, -fed)(transitive)

1. to give too little food to
2. to supply (a furnace, engine, etc) with fuel from beneath