mighty
The opposite of 'big' is little.
The typical word is "little."
The 4-letter root word meaning against or opposite is "anti."
into
A five letter word meaning the opposite of hurry would be dally. There may well be others
stop or halt is a four letter word meaning the opposite of go.
The opposite of unusual is common.
The word is empty.
"Little"
little
The word is likely "modern."
frontal? Forward?