underburn

English edit

Etymology edit

From Middle English underbrennen (“to set on fire, burn up”), equivalent to under- +‎ burn.

Verb edit

underburn (third-person singular simple present underburns, present participle underburning, simple past and past participle underburned or underburnt)

(transitive, obsolete) To burn up.
(transitive) To burn too little.

Noun edit

underburn (plural underburns)

The deliberate burning of surface fuel so as to leave the tree canopy intact.