Abarim Publications' online Biblical Hebrew Dictionary
The verb בשם (bsm) isn't used in the Bible but it's pretty sure it once existed. In cognate languages it means to have a sweet odor, or be sweetly pleasant.
This root's sole derivation is the masculine noun בשם (basam), meaning spice, balsam or sweet smell (Exodus 30:23, Isaiah 3:24, Esther 2:12). Besides smelling great, this balsam served as a token of wealth (2 Kings 20:13), a royal gift (1 Kings 10:2), and, of course, as an article of commerce (Ezekiel 27:22).
It was burned at burials (2 Chronicles 16:14). It was an ingredient of the anointing oil (Exodus 25:6). And it was used to purify Esther and the other brides to be of emperor Ahasuerus (Esther 2:12).