出其不意，攻其不备

Traditional form:

出其不意，攻其不備

Pinyin (reading):

chūqíbùyì,gōngqíbùbèi

Definitions:

• to catch an enemy off guard with a surprise attack (idiom, from Sunzi's "The Art of War" 孫子兵法／孙子兵法 ( Sūnzǐ Bīngfǎ))

Characters:

• 出 - to go out, to send out; stand; produce
• 其 - his, her, its, their; that
• 不 - no, not, un-; negative prefix
• 意 - thought, idea, opinion; desire, wish; meaning, intention
• 攻 - to accuse; to assault; to criticize
• 其 - his, her, its, their; that
• 不 - no, not, un-; negative prefix
• 备 - to prepare; to get ready, to equip; ready; perfect

Traditional characters:

• 出 - to go out, to send out; stand; produce
• 其 - his, her, its, their; that
• 不 - no, not, un-; negative prefix
• 意 - thought, idea, opinion; desire, wish; meaning, intention
• 攻 - to accuse; to assault; to criticize
• 其 - his, her, its, their; that
• 不 - no, not, un-; negative prefix
• 備 - to prepare; to get ready, to equip; ready; perfect