newfangled

up to date

current

new

timid

prudent

meek

cowardly

giving

generous

thoughtful

considerate

naughty

impetuous

spirited

energetic

deafening

emphatic

boisterous

loud

vintage

old

ancient

aged

obese

fat

plump

rotund

The resesarch report was a demanding assignment.

The resesarch report was a diificult assignment.

The resesarch report was a challenging assignment.

The resesarch report was an overwhelming assignment.

Three years later, Carlos and his men returned from the brief journey.

Three years later, Carlos and his men returned from the grueling journey.

Three years later, Carlos and his men returned from the long journey.

Three years later, Carlos and his men returned from the painless journey.

His behavior and mannerisms were juvenile.

His behavior and mannerisms were immature.

His behavior and mannerisms were childliike.

His behavior and mannerisms were childish.