jam

squeeze or pack tightly into a specified space

become or make unable to move or work due to a part seizing up or becoming stuck

improvise with other musicians, especially in jazz or blues

an instance of a thing seizing or becoming stuck

an awkward situation or predicament

an improvised performance by a group of musicians, especially in jazz or blues.

a sweet spread or conserve made from fruit and sugar boiled to a thick consistency

make (fruit) into jam.