名詞 ranker:

1. a commissioned officer who has been promoted from enlisted status
2. an enlisted soldier who serves in the ranks of the armed forces

形容詞 rank:

1. very fertile; producing profuse growth
   同義詞：rank
2. very offensive in smell or taste
   同義詞：rank
3. conspicuously and outrageously bad or reprehensible
   同義詞：crying, egregious, flagrant, glaring, gross, rank
4. complete and without restriction or qualification; sometimes used informally as intensifiers
   同義詞：absolute, downright, out-and-out, rank, right-down, sheer
5. growing profusely
   同義詞：rank

rank.er

n.Chiefly British （名詞）【多用于英國】
An enlisted soldier.
士兵，列兵：招募的低級士兵
A commissioned officer who has been promoted from enlisted status.
行伍出身的軍官：由普通士兵提拔起來負戰(zhàn)斗責任的軍官