意気揚々 triumphant; in high and proud spirits​
利害 advantages and disadvantages; interests (of parties)
一片 a slice; a piece
そこいら that area
波及 spread; extension
ひいては eventually (lead to) ~; even
群れ group; crowd
体たらく state of affairs; predicament
逆襲 counterattack
無様 unsightly; clumsy
併用 using together (jointly); used at the same time
ひ弱い weak; sickly