And

Generally, the word "and" is implied by repeating a particle or preposition.

jan li kama li tawa.
jan li kama li tawa.

People come and go.

sina pali e lipu e toki sin.
sina pali e lipu e toki sin.

You make books and new languages.

In subjects

The particle en is used to to connect multiple subjects.

soweli en waso li pona.
soweli en waso li pona.

Mammals and birds are good.

In modifiers

Listing multiple modifiers is the same as saying "and" between them.

sike loje suli
sike loje suli

big (and) red ball

Repeating dropped li

See also: li § Multiple predicates

There is some disagreement over whether to repeat li when the first instance is dropped after mi or sina or to make a new sentence. Multiple sentences might make a clearer distinction between statements, such as below:

mi ike li wile weka.
mi ike li wile weka.

Those of us who are bad need to go away.

mi ike. mi wile weka.
mi ike. mi wile weka.

We are bad and we need to go away.