The English word just has a number of apparently different senses.

(1)       Just say 'no'!

(2)      Just yesterday.

(3)      Just a fool for love.

(4)      Just look at that!

(5)      Just saying.

(6)      I just remembered.

(7)      Just to the left.

(8)      Not just a student.

(9)      No one was touching it. The gun just went off.

(10)    Just ... just ... shit! Look at that mess!

The puzzle is how to understand this variety.