名詞 bolster:

1. a pillow that is often put across a bed underneath the regular pillows
   同義詞：long pillow

動詞 bolster:

1. support and strengthen
   同義詞：bolster up
2. prop up with a pillow or bolster
3. add padding to
   同義詞：pad

1. All attempts to bolster up colonialism are bound to fail.
   一切想維護(hù)殖民主義的企圖都是注定要失敗的。
2. There is a bolster across the head of the bed.
   床頭上有一個長枕墊。
3. It bolstered my belief.
   這增強(qiáng)了我的信念。
4. They bolstered their morale by singing.
   他們以唱歌來鼓舞士氣。

bol.ster

n.（名詞）
A long, narrow pillow or cushion.
長枕，墊枕，靠墊：長而窄的枕頭和軟墊
v.tr.（及物動詞）
bol.stered,bol.ster.ing,bol.sters
To support or prop up with or as if with a long, narrow pillow or cushion.
支撐：如用長枕靠墊支撐或支承
To buoy up:
鼓勵：
例句：
Visitors bolstered the patient`s morale.
探訪者鼓起了病人的信心

來源：
Middle English
中古英語
from Old English * see bhelgh-
源自 古英語 *參見 bhelgh-

【引伸】
bol.sterer
n.（名詞）