She seemed lost in thought all day and didn't say a word.
Tips
history
Recorded in Pu Songling's Strange Tales from a Chinese Studio (《聊斋志异·黄九郎》), where a character was 'restless as if having lost something, forgetting to eat or sleep' - describing the daze of an obsessed lover.
memory
Parse as 若 (as if) + 有所 (have something) + 失 (lost) - 'as if there were something lost.' The vagueness is the point: you can't say what's missing, only that something is.
