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 (1466), この (506), 私 (499), こと (482), お前 (356), その (341), 次 (288), おまえ (237), こっち (235), こんな (215), あなた (211), 俺 (201), そんな (201), 今年 (189), それ (187), あんた (185), いい (184), 人 (164), 今 (160), こんど (142), そういう (139), ごめん (130), それは (129), 自分 (129), そして (124)