bereft/bereaved

これも "Ben and Me" からです。　どうも必須単語の匂いがしますが私の語彙にはもれていました。
"Oh, Monsieur Amos," she said softly, "could you but accomplish this, what happiness would you bring to a bereft family."
辞書を引きます。　形容詞の意味・用法がDictionary.comには:　deprived: 例： They are bereft of their senses. 例: He is bereft of all happiness.
OneLook Quick Definitionsには unhappy in love; suffering from unrequited love; sorrowful through loss or deprivation 例: bereft of all hope
が出ていましたが "bereft" は元々 "bereave" と言う動詞の過去及び過去分詞なので "bereave" もDictionary.comを見ると：
1. to deprive and make desolate, esp. by death (usually fol. by of): Illness bereaved them of their mother.
2. to deprive ruthlessly or by force (usually fol. by of): The war bereaved them of their home.
とあるように "bereave" の過去・過去分詞は "bereaved" もあります。
"bereft" と "bereave" に違い、使用頻度の差があるのか気になったので幾つか別の辞書を見ると Online Etymology Dictionaryに次ぎの説明がありました。
Since c.1650, mostly in ref. to life, hope, loved ones, and other immaterial possessions. Past tense forms bereaved and bereft have co-existed since 14c., now slightly differentiated in meaning, the former applied to loss of loved ones, the latter to circumstances.
またWebster's Revised Unabridged Dictionaryには：form bereaved is not used in reference to immaterial objects. We say bereaved or bereft by death of a relative, bereft of hope and strength.
とあります。 微妙な使い分けがあるのですね。