All the words except guffaw mean 'feeling sorrow'. Guffaw means loud laughter.

Assertive is antonymous to all the other options here. It means having or showing a confident and forceful personality.

All the other words except scanty refer to excess of something. Scanty refers to small or insufficient in quantity or amount.

All the other words except alert refer to carelessness. Alert refers to carefulness.

All the other words except implied refer to real or clear. Implied refers to suggested but not directly expressed.

All the other words except reserve refer to speak or utter. Reserve refers to keep back or save for future use, disposal, treatment, etc.

All the other words except coarse refer to subject or idea of something spoken or written. Coarse means (of a person or their speech) rude or vulgar.

All the other words except retrograde refer to forward motion. Retrograde refers to moving backwards.

All the words except freedom are related to protection.

Initial is antonymous to all the other options here. It means first.

All the words except pleasant mean ghastly or horrific.

All the other words except haven are related to happiness. Haven refers to any place of shelter and safety.

All the words except muzzle means 'releasing (somebody or something)'. Muzzle means the mouth, or end for discharge, of the barrel of a gun, pistol, etc.

Approve is antonymous to all the other options here.

Fair is antonymous to all the other words here.

All the other words except indifferent means to engage. Indifferent means without interest or concern; not caring.

All the other words except repel are synonymous. Repel means to thrust back or away.

All the other words except punish are related to applying force to compress or stretch. Punish means to inflict a penalty or sanction on (someone) as retribution for an offence.

All the options except Benevolent refers to 'causing fear'. Benevolent means kind.

All the other words except passive mean agitated. Passive means not reacting visibly to something that might be expected to produce manifestations of an emotion or feeling.

All the other words except fame are related to the sate of being alone.

Shirker is antonymous to all the other options here. It means a person who evades work, duty, responsibility, etc.

Disperse is antonymous to all the other words here. It means to spread widely.

All the other words except ordinary are synonymous.

Regress is antonymous to all the other options. It means to revert to an earlier or less advanced state or form.