词典释义：
having a sharp, pungent taste or smell; not sweet
辛辣的，苦的
-
raw berries have an intensely bitter flavour. 生的浆果有浓重的苦味。
(of chocolate)dark and unsweetened
（巧克力）黑色不加糖的。
feeling or showing anger, hurt, or resentment because of bad experiences or a sense of unjust treatment
愤怒的；委屈的；受伤害的；怨恨的
-
I don't feel jealous or bitter 我没有感到嫉妒和怨恨
-
she wept bitter tears of self-reproach. 她因自责而流下痛苦的眼泪。
painful or unpleasant to accept or contemplate
令人痛苦的，令人不愉快的，难以接受的
-
today's decision has come as a bitter blow 今天的决定是令人难以承受的打击
-
she knew from bitter experience how treacherous such feelings could be. 她从痛苦的经历中知道，这样的感觉会是多么不可靠。
(of a conflict, argument, or opponent)full of anger and acrimony
（冲突、争论或对手）怒不可遏的；激烈的；尖酸刻薄的
-
a bitter five-year legal battle. 一场持续五年的激烈的诉讼争斗。
(of wind or weather)intensely cold
（风，天气）凛冽的，刺骨寒冷的
-
a bitter wind blowing from the east. 从东面刮来的凛冽寒风。
[mass noun]
〈英〉 苦啤（酒）。
(
苦精，比特酒，苦味酒。
-
to the bitter end used to indicate that one will continue doing something until it is finished, no matter what 义无反顾，坚持到底the workers would fight to the bitter end. -
［ORIGIN perhaps associated with a nautical word
bitter denoting the last part of a cable inboard of theBITTS , perhaps influenced by the biblical phrases ‘her end is bitter as wormwood’. （Prov. 5∶4）．］
"Old English
