Another entry in the Donaldson lexicon.

guer·don /ˈgɜrdn/

1.    a reward, recompense, or requital.
–verb (used with object)
2.    to give a guerdon to; reward.

[Origin: 1325–75; ME < OF, var. of werdoun < ML widerdonum, alter. (prob. by assoc. with L dōnum gift) of OHG widarlōn, equiv. to widar again, back + lōn reward; c. OE witherléan]

—Related forms
guer·don·er, noun
guer·don·less, adjective