One Word Substitution

'Manipulative' is one 'who exercises unscrupulous influence over situations'. 

'Leisure' means 'the time when one is not working or occupied; free time'.

Option (2) is correct.

Patricide means the act of murdering one's father. Root 'patri' means father, and 'cide' means killing.

Germination is the process by which a seed begins to grow and develop into a new plant. Radicle is the embryonic root, Plumule is the embryonic shoot, Annual refers to a plant life cycle.

Inedible means not fit for consumption or eating. Eligible means qualified, Audible means able to be heard, Pure means clean or unmixed.

Quadruped is an animal, esp. a mammal, with four feet.  

Irrigate means to supply land with water through artificial channels or systems. Drought is lack of water, Stomata are pores on leaves.

Expatriate means to banish or exile someone from their native country. Imports refers to goods brought into a country, while tariff is a tax on imports/exports.

Irrelevant means not related or not to the point. Inevitable means unavoidable, invisible means cannot be seen, and immortal means living forever.

A telephone is specifically designed to transmit voice over distances. A microscope is for magnifying small objects, and a barometer measures atmospheric pressure.

Infallible means incapable of failure or error. Indelible means cannot be erased, irreducible cannot be simplified, and invincible cannot be defeated.

A bayonet is specifically a knife-like weapon that attaches to the muzzle of a gun. A machete is a broad cleaving knife, a switchblade is a folding pocket knife, and a dagger is a thrusting weapon.

A bulletin is an official statement or report, especially on war or political matters. A garrison is a military post, and a conscript is an enlisted soldier.

A catalogue is a systematic list of items, specifically books in a library. A diary is a personal journal, and a glossary explains terms.