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Related to underfeed: underfeeding
tr.v. un·der·fed (-fĕd′), un·der·feed·ing, un·der·feeds
1. To feed insufficiently.
2. To supply (an engine) with fuel from the underside.
vb (tr) , -feeds, -feeding or -fed
1. to give too little food to
2. (General Engineering) to supply (a furnace, engine, etc) with fuel from beneath
(General Engineering) an apparatus by which fuel, etc, is supplied from below
un•der•feed(ˌʌn dərˈfid for 1; ˈʌn dɛrˌfid for 2 )
v.t. -fed, -feed•ing.
1. to feed insufficiently.
2. to feed with fuel from beneath.
Past participle: underfed