facetious
being unserious in a serious situation
facile
superficial
fallacy
a mistaken belief
fastidious
attention to detail
feral
a wild state
flagrant
bad behavior
florid
red/flushed complexion
fluid
flows easily idk
fractious
irritable bothersome
frank
honest
fraternize
form a friendship
frenetic
fast and energize in an uncontrolled way
parenthesis
an explanatory or qualifying word, phrase, clause, or sentence inserted into a passage.
I am going to visit my grandma (my dad’s mom) today.