integral	forming an essential part of something and needed to make it complete (YintyGrol)
integrate	to make someone become a full member of a group or society and be involved completely in its activit
interfere	to deliberately become involved in a situation and try to influence the way that it develops
intermediate	at an academic level below advanced
intermediate	in between two stages, places, levelsz times etc.
internal	existing or happening inside an object, a building or your body
intervene	to become involved in a situation in order to try to stop or change it (yntyWin)
intimate	intymny (YntyMyt)
involve	to include something as a necessary part of an activity, event or situation
joint	involving two or more people or done by them together (wspólny)
liken	to say that sth is similar to sth else (upodabniać)
link	if people, things or events are ..., they are related to each other in some way
link	to say or show that two are related, or that one of the things causes the other
link	a connection between two or more people, places, facts or events, esp. when one is caused by the sec
merge	if two things or organisations ..., they combine to form one bigger thing/organisation
mutual	felt or done in the same way by each of two or more people (mjuCzjul)
negotiate	negocjować (neGołSziejt)
related	if two or more things are ..., there is a connection between them
relative	having a particular quality when compared to sth else
resemblance	if there is a ... between two people or things, they are similar, especially in their appearance