To socialize or engage with someone else
Interact
Serving or used in place of another.
Alternative
Deny the truth or existence of
Negate
To change the emphasis, direction, or focus of
Shift
Central or essential
Core
To define or identify clearly
Specify
To change or take action in response to something
React
To lend assistance or aid, or to give something to a common cause
Contribute
Statement that expresses a personal opinion or belief, or adds information.
Comment
A level in something that cannot be seen or touched, used to describe meaning
Layer