edacious
a. 貪食的，狼吞虎嚥的(gluttonous, voracious)
→ed, to eat; -acious, full of

loquacious
a. 多嘴的，饒舌的(talkative, garrulous)
→loqu, speak

pertinacious
a. 頑強的；堅持的，持久的；不屈不撓的
→per-, intensive mood強調；tin, ten, tain, to hold

pugnacious
a. 好鬥的(quarrelsome)；好戰的(dukes-up)
→pugn, to fight ; -acious , tending to

tenacious
a. 固執的，堅持的(stubborn, persistent)；
黏牢的(adhesive, cohesive)；抓住不放的(retentive)
→ten, tin, tain, to hold

vivacious
a. 活潑的，生動的(lively)；快活的→viv, to live

voracious
a. 貪婪的(grasping, greedy, covetous)；貪食的(edacious, gluttonous)；
飲食過度的→vor , to devour吞食