persistence; single-mindedness; sticking to one point; always making the same bet
pouring all one's efforts into a single issue (goal, etc.); focusing entirely on one objective; single-minded approach; concentrated all-out effort; targeted strike
the lone woman (e.g. bright flower) in a group
the dots of i's and the crosses of t's; (not neglecting) the slightest details
prediction of another player's winning tile or yaku
yellow stem borer (Scirpophaga incertulas)