I. | ̷ ̷ ̷ ̷| ̷ ̷ transitive verb
Etymology: under (I) + feed
1. : to feed with too little food
2. : to feed with fuel from the underside
II. ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ adjective
: being fed or feeding from beneath
underfeed stroking of a furnace
— opposed to overfeed