These words all mean to put or keep sb/sth in a place where they/it cannot be seen or found, or to keep the truth or your feelings secret. 以上各词均含藏、隐藏、掩盖、隐瞒之义。

• hide to put or keep sb/sth in a place where they/it cannot be seen or found; to keep sth secret, especially your feelings 指藏、隐藏、掩盖（尤指感情）：◆He hid the letter in a drawer. 他把信藏在抽屉里。◆She managed to hide her disappointment. 她设法掩藏了自己的失望。
• conceal (formal) to hide sb/sth; to keep sth secret 指隐藏、隐瞒、掩盖：◆The paintings were concealed beneath a thick layer of plaster. 那些画藏在厚厚的灰泥层下面。◆Tim could barely conceal his disappointment. 蒂姆几乎掩饰不住自己的失望。 NOTE When it is being used to talk about emotions, conceal is often used in negative statements. * conceal 指掩藏感情时常用于否定句。
• cover to place sth over or in front of sth in order to hide it 指掩蔽、遮盖：◆She covered her face with her hands. 她双手掩面。
• disguise to hide or change the nature of sth, so that it cannot be recognized 指掩蔽、掩饰、伪装，以免被认出：◆He tried to disguise his accent. 他竭力掩饰自己的口音。
• mask to hide a feeling, smell, fact, etc. so that it cannot be easily seen or noticed 指掩饰、掩藏（情感、气味、事实等），以免被看出或注意到：◆She masked her anger with a smile. 她用微笑来掩饰她的愤怒。
• camouflage to hide sb/sth by making them/it look like the things around, or like sth else 指通过使人或事物与周围环境或其他事物相似而达到伪装、掩饰的目的：◆The soldiers camouflaged themselves with leaves and twigs. 士兵用树叶和树枝来伪装自己。

Patterns

• to hide/conceal/disguise/mask/camouflage sth behind sth
• to hide/conceal sth under sth
• to hide/conceal sth from sb
• to hide/conceal/disguise/mask the truth/the fact that…
• to hide/conceal/disguise/mask your feelings