cred (to believe)
duct (to lead)
fer (to bear, carry)
press (to press)

spir (to breathe)
200

A system of doing business by trusting that person will pay at a later date for goods and services.

Credit

200

A person who directs the performance of a choir or an orchestra

Conductor 

200

(Plants) able to bear fruit. 

(Animals) able or likely to conceive young.

Fertile

200

A printing machine

Press 

Such as Printing Press

200

An immaterial intelligent being

"The seat of emotions and character"

Spirit

400

A set of beliefs or principles.

Creed

400

To train the mind and abilities of 

Educate 

400

To carry again, to submit to another for opinion.

Refer

400

Verb: to utter 

Noun: any fast conveyance

Retro: A clothing store that originated in the 80s (lol)

Express

400

To breathe out, cease to be valid 

Expire

600

Unbelievable

Incredible 

600

To enroll as a member of 

Admit into an organization or position

Induct 

600

To convey to another place; passed from one place to another.

Transfer

600

To press against, to burden, to overpower

To hold back and not allow

Oppress 

600

To breathe through, to emit through the pores of the skin

Perspire

800

Verb, prefix meaning "not": the word means to damage the good reputation of

Discredit 

800

The formal presentation of one person to another

Introduction 

800

Endurance of pain, distress

Suffering 

800

State of being "pressed down" or saddened 

Depressed/Depression

800

To breathe into, to instruct by divine influence

To fill someone with the urge or ability to do something

Inspire

1000

Adjective, prefix ac, word means officially recognized.

Schools go through this process. 

Accredited

1000

An artificial channel carrying water across country. A watercourse or conduit for water. 

Aqueduct

1000

Cone bearing, as the fir tree

Conifer/Coniferous

1000

To put down, to prevent circulation, put an end to

Suppress 

1000

To plot, to band together, usually for a sinister purpose

Conspire