ject = throw
project
projected
projectile
ile ->(n)something
projecting
ing-> adj
projection
projector
jut
inject
injection
object
ob=op(opposite)
UFO
Unidentified Flying Object
objection
objectionable
objective
objectively
objectivity
subject
subjective
reject
rejection
trajectory
abject
adjacent
adjective
conjecture
eject
interject
jet
jetliner
jettison
ease
gist
ju-, jur-, just-, jus, jud = law, right, 司法，公平，正义，审判
just
justly
unjust
justice
injustice
justify
justified
justification
justifiable
justifiably
jury
perjury
per- = away + jury
jurist
jur- = jury + ist
juror
jurisprudence
injure
injury
conjure
adjust
adjuster
adjusted
rejust
adjustable
adjustment
adapt
adapter
adaptive
adaptable
adaptation
adaptability
judge
judgement
judgmental
judicial
judiciary
judicious
jurisdiction
adjudicate
paradigm
preach
precher
predicament
predicate
prejudice
prejudiced
policy
politics
political
politician
policymaker
policy-making
phrase
phrasing
paraphrase
subtle
subtly
subtlety
teach
teacher
token
verdict
vindicate
vindictive
Q.E.D.