JMdict: 1004410

こそ

1. [prt] it is ... that ...; precisely; in particular; definitely; for sure; only (when, after, because, etc.)
2. [prt] although; while; it is the case that ... but
3. [prt] it is precisely because ... that ...; only because ...
4. [prt] not at all; not in the slightest; absolutely not; never

Words often seen with this one: (experimental feature)

今度 (934), 私 (320), この (304), こと (281), お前 (220), その (200), 次 (190), そっち (186), こっち (148), おまえ (146), こんな (137), あなた (129), 今年 (127), 俺 (122), あんた (121), いい (116), 今 (114), そんな (113), 人 (108), こんど (105), それ (103), そういう (89), ごめん (89), オレ (86), そして (85)