Collins Cobuild English Grammar (207 page)

R142
  With
full
and
dull
, you just add
y
.

full		fully
dull		dully

R143
  Note that
ly
is not generally added to adjectives ending in
ed
to form adverbs. However, here is a list of adverbs that are formed in this way:

absent-mindedly

admittedly

allegedly

assuredly

belatedly

blessedly

contentedly

crookedly

decidedly

dejectedly

delightedly

deservedly

determinedly

distractedly

doggedly

exaggeratedly

excitedly

fixedly

frenziedly

guardedly

half-heartedly

heatedly

hurriedly

light-heartedly

markedly

pointedly

repeatedly

reportedly

reputedly

resignedly

single-handedly

supposedly

undoubtedly

unexpectedly

unhurriedly

wholeheartedly

wickedly

R144
  A few adverbs that end in
ly
are related to nouns.

These include some time adverbs.

day		daily
fortnight		fortnightly
hour		hourly
month		monthly
quarter		quarterly
week		weekly
year		yearly

Note the spelling of
daily
. These words are also themselves used as adjectives. Other adverbs related to nouns are shown below.

name		namely
part		partly
purpose		purposely
body		bodily