burden, impediment

Same as above

a tarsal bone

a metatarsal bone

a plantaris muscle

(informal) "octopus leg wiring": electrical setup involving multiple devices attached to one outlet, hence cluttered and carrying the risk of overloading

(informal) the lady doth protest too much; a girl's protests should not necessarily be taken at face value.

“a hundred days of sermonizing, one fart” → a metaphor for how something that one has put great effort into can come to nothing after even a slight mistake, much as a hundred days of serious spiritual study can be lost to the winds

flattery will motivate anyone, flattery can do wonders

making an unnecessary addition