pi and possessives

If you wanted to say "my house" you say tomo mi. Similarly, "your house" is tomo sina. However, if you want to name a specific person who owns the house, you have to use pi. Note that you can not say tomo Lisa. That changes the whole meaning.

tomo pi jan Lisa		Lisa's house
kili mi		my fruit
kili pi jan Susan		Susan's fruit
ma ona		her country
ma pi jan Keli		Keli's country
len jan		somebody's clothes
len pi jan Lisa		Lisa's clothes

Also, if you want to use the plural pronouns you have to use pi:

nimi pi mi mute		our names
tomo pi ona mute		their house

We also use pi to express the opposite of some words:

jan wawa		strong person
jan pi wawa ala		a weak person
jan wawa ala.		No strong people.