köken: Borrowed from Spanish nuestramo or Catalan nostramo (“notary”), from nuestro amo/el nostre amo (“our master”), under the influence of uomo (“man”).
köken: Borrowed from Italian nostromo with dissimilation of consonants [n]-[m] > [l]-[m], from Catalan nostramo or Spanish nuestramo < nuestro (“our”) amo (“master”), used in 16th century slave galleys as "overseer".
köken: Etymology tree German Boot German -s- Proto-Indo-European *mon- Proto-Germanic *mann- Proto-West Germanic *mann Old High German man Middle High German man German Mann German Bootsmannbor. Polish bosman Borrowed from German Bootsmann.
Inherited from Old Swedish batsman, either from Middle Low German bōsman or Middle Dutch bōtsman. Equivalent to båt + -s- + man. Compare English boatsman, Dutch bootsman, German Bootsmann.