These are terms that can help us express ourselves more formally, breaking away from casual conventions.

Advanced English Vocabulary

A method of drawing conclusions by going from the specific to the general (bottom to top).

A method of drawing conclusions from general ideas or premises to the specific (top to bottom).

Suppose that something is true without having evidence to confirm it. To suppose, to assume.

Unwelcome influence or physical effect, spreading widely throughout an area or a group of people. Having negative effects.

To have a harmful effect, especially in a gradual or subtle way.

Refusing to be persuaded or to change one's mind. Reluctant, unwilling.

To restrict or burden (someone or something) in such a way that free action or movement is difficult. To cause trouble or hindrance.

Large or heavy and therefore difficult to carry or use; unwieldy. Could refer to something complex and difficult in a literal or symbolical way.

Possible to do easily or conveniently. Something that can be easily translated to reality.

Put an end to (a rebellion or other disorder), typically by the use of force. Can also be used to refer to the suppression of a feeling, especially an unpleasant one.

Lacking in vitality, force, or conviction; uninspired or uninspiring. Something weak, without a solid standing.

Showing the effects of exhaustion or strain. Worn out.

Unable to be affected by, immune to instigation.

Characterized by the belief that the parts of something are interconnected and can be explained only by reference to the whole.

Deriving ideas, style, or taste from a broad and diverse range of sources.

To bring about or initiate (an action or event). To provoke, to cause.

Very bad and shocking. Extremely unpleasant.

Lessen the effectiveness, power, or ability of.

A confusing and difficult problem or question.

Strict, precise, and exacting. Usually referred to policy and law.

The amount of freedom to move or act that is available.

An opinion or conclusion formed upon incomplete information.

It is said of something noisy, energetic, cheerful, wild.

Resistance, delay, obstruction, something that has the capacity to delay or obstruct progress.

To strengthen, to boost, to fortify, to reinforce.

Being fascinated, having one's attention captured by something captivating.

To entrust a task or responsibility to another person.

To cover or envelop so as to conceal from view.

To put a severe or excessive demand on the strength, resources, or abilities of someone or something.

A person or thing that precipitates an event, the origin or cause that triggers an event.

A warning or proviso of specific stipulations, conditions, or limitations.

Prevent, obstruct, block an event happening in the future.

A tendency to choose or do something on a regular basis; an inclination or predisposition toward a particular thing.
"A proclivity for good business deals"

Given to or involved in conspiring to do something immoral, illegal, or harmful.
"A misleading and conniving enterprise"

Prevent, suppress, or constrain (an activity or idea).

To think deeply about something. 
"I sat ruminating on the nature of our industry"