bathes is a form of:

Semimonthly



ENGLISH MEANING
noun
1.
Something done or made every half month; esp., a semimonthly periodical.
adjective
1.
Coming or made twice in a month; as, semimonthly magazine; a semimonthly payment.
adverb
1.
In a semimonthly manner; at intervals of half a month.