rhythmical
From LSJ
ἑλλέβορον ἤδη πώποτ' ἔπιες → did you ever drink hellebore at any point, did you ever drink hellebore, have you ever taken medication for mental illness, are you mad, you are mad, what are you on
English > Greek (Woodhouse)
adjective
rhythmic beat of oar: V. κώπης συνεμβολή (Aesch., Persae 396).