With age, the speed of trasmission of impulses through our nerves slows our brain contain ever larger amounts of material to remember.
sometimes
sorry
south
speak
special
spell
spend
opinion
organization
organize
spent
spring
stamp
stand
statement
station
steamer
still
himself
page
stone
home
paper
pass
stood
summer
pleasant
suppose
improvement
please
surprise
include
increase
indeed
popular
population
information
position
possible
doctor
instead
investigate
invitation
preliminary
practical
terrible
testimony
pound
interest
power
prefer
tenth
president
present
theater
their
pretty
primary
principal
print
judgment
promise