marble (spherical ball) / ball / ball bearing / dimwit

tree trunk (chopped down, ready for sawing) / railway sleeper / rolling pin

inflection of biller:
/ inflection of biller:

ballpoint pen

plural of stylo à bille

unhesitatingly, audaciously, boldly / rashly, recklessly, without thinking, on a whim

(informal) to know one's stuff, to know one's onions

ticket / note, a brief message / banknote

plural of billet

to turn a piece of wood placed on a support / to flatten dough with a rolling pin / to place balls of solder on a component in preparation for welding to a printed circuit board