Break down that word!
To double or not to double...
y --> i?
200

unhappily

un + happy + ly

200

fun + y

YES

funny

200

try + ing 

trying

400

disorganized

dis + organize + ed

400

hop + s

NO

hops

400

busy + ly

busily

600

enjoyable

en + joy + able

600

stop + able

YES

stoppable

600

happy + ly -->

happily

800

overreaction

over + re + act + ion

800

read + ing

NO

reading

800

busy + er

busier

1000

dismissive

dismiss + ive

1000

sad + en + ed

YES

saddened

1000

play + ful

playful