Loss
the fact that you no longer have something or have less of something
喪失，失去
He suffered a gradual loss of memory.
他的記憶力越來越差了。
lose, at a loss, got lost, lost it, lose me 失去/不知所措/迷路/失心瘋/講到聽不懂（英文和意思
only & italic
弄的我好亂呀！ Feel free leaving a comment to identify the specific meaning for each sentence.
oodles 我該學這個字嗎？
在 Cambridge 字典裡，可以看到這個單字被標示為 「old-fashioned, informal」，老就算了，還不正式！但這個字看起來超級好記耶……