vain > empty, futile; foolish allurements > charms, baits
5 When them the wary boatman thus bespoke:
bespoke > addressed
6 "Here now behoves us well to advise,
behoves > [it behoves] advise > take stock, consider
7 And of our safety good heed to take; 8 For here before a perilous passage lies,
before > ahead
9 Where many mermaids haunt, making false melodies.
haunt > resort, frequent
212.18