不厌其烦

not to mind taking all the trouble (idiom) / to take great pains / to be very patient

no; not so / (bound form) not; un-

not to tire of / not to object to

(bound form) to loathe; to be fed up with / (literary) to satiate; to satisfy

his / her / its / their / that / such / it (refers to sth preceding it)

to feel vexed / to bother / to trouble / superfluous and confusing / edgy