Antonyms

Amiable means friendly, good-natured, and pleasant. Unfriendly is the direct antonym. Certain and definite mean sure or clear, cold means unemotional, and obstinate means stubborn.

Marinating involves soaking food in liquid to add flavor and moisture, making the food wet. The opposite process would be to remove moisture or keep something dry.

'Aloof' means 'uninvolved and distant'. 'Sociable' means 'friendly and involved'.

Amateur refers to someone who engages in a pursuit for pleasure rather than professional gain - someone inexperienced or unskilled. Professional is the direct opposite, referring to someone skilled, experienced, and paid for their work. The other words are unrelated antonyms.

'Ambiguous' means 'not clear or decided'.
'Definite' means 'clearly stated or decided'.

Abominable means very bad; terrible; hateful. Pleasant is something that is good; likeable.

Abolish means to formally put an end to a system or practice. Establish is the direct antonym, meaning to set up or create.

'Abortive' means 'failing to accomplish an intented objective' which is the opposite of 'successful'.

'Abbreviate' means 'to make shorter' which is the opposite of 'lengthen'.

'Grotesque' means 'repulsively ugly or distorted' which is the opposite of 'beautiful'. 

Abhorrent means inspiring disgust and loathing. Alluring, meaning powerfully and mysteriously attractive, is the correct antonym.

Accidental means to do something unintentionally.

Slanderous means false and malicious (statements or reports). Rational is antonymous to it.

Alarm means to cause someone to feel frightened or disturbed. Reassure is the correct antonym, meaning to restore confidence.

'Acerbic' means 'sharp and forthright, especially a comment or style of speaking'.
Polite is the nearest antonym among the given options.

Allay means to alleviate or calm down. Hence, its opposite is 'aggravate'.

Adulate means to praise someone excessively. Mockery, which involves teasing or ridiculing, is the correct antonym.

'Affirmative' means 'positive' which is opposite of 'negative'.

 Antonym of acute is chronic.

Alleviate means to make suffering or a problem less severe. Aggravate is the correct antonym, meaning to make a problem worse.

Amalgamate means to combine or unite to form one organization or structure. Split is the correct antonym, meaning to break apart.

'Ambivalent' means 'having mixed feelings or conflicting ideas about something or someone'.
'Certain' means 'having or feeling of no doubt or uncertainty'. 

'Melody' means 'harmony or something which is consistent'.
'Unarranged' means 'not organised or planned in advance'.

'Amenable' means 'open and responsive to suggestions'.
'Cold' means 'unaffectionate or friendly'. 

 Cold is antonymous to amorous.