The words having the prefix ad, ac, af, ag, al, an, ar means to, toward

Word	Meaning
Adapt	Is able to fit in ; alter ; modify
Addiction	One who is giving over to a habit, often drugs; compulsive; habitual need
Adhere	Stick to
Adjacent	Lying near; side by side
Adjunct	One thing joined to another
Adulterate	To change to an impure quality
Advocate	To speak out for a worthy case
Aggressive	Inclined to attack
Allege	To declare without proof
Assert	To declare, state positively