Alacrity

Alacrity = ala (le la) + crity (creativity)
le aa, aur creativity le aa

meaning - liveliness and eagerness

synonyms - briskness, smartness

connotation - positive

pic - creativity brings on liveliness and alacrity in an artist

Altercation

Altercation - alter (alter) + cation (cation)

meaning -a loud argument or disagreement

synonyms - affray, fracas

connotation - negative

pic - when you alter a cation in NaCl molecule with an anion, disagreement appears between anion and anion.

Atonement

Atonement - A (anti) + tonement (torment)

anti-torment means act of atoning for sins i.e compensation for a wrong

meaning - to do something that shows that you are sorry for something bad that you did

pic - pple goto Haridwar (India) for atonement for their sins

Abate

abate = ab + ate
When you eat anything, you reduce it's quantity.

meaning - to become less strong (both in quantity and quality)

pic - rhyming with rebate (lesser amount)

Argot

argot = ar (our) + got (goat)
pic - when a goat says "meh...mheh...meh..." we cannot understand its lingo - only other goats can understand it. So, argot is a lingo only small group of people (here goats) can understand.

meaning - words and expressions which are used by small groups of people and which are not easily understood by other people.