( 鬼神 ) be superstitious about ⇒ 他迷信鬼神。 Tā míxìn guǐshén. → He has a superstitious belief in ghosts and spirits.
通信
correspond
音信
news singular ⇒ 最近几年,他音信全无。 Zuìjìn jǐ nián, tā yīnxìn quán wú. → There's been no news of him for several years.
信用卡
credit card
慰问信
letter of support
明信片
postcard
信口开河
talk off the top of one's head
信口雌黄
make irresponsible remarks ⇒ 我们对那些记者的信口雌黄感到愤慨。 Wǒmen duì nàxiē jìzhě de xìn kǒu cíhuáng gǎndào fènkǎi. → We are outraged at the irresponsible comments made by the journalists.
将信将疑
only half believe
杳无音信
never heard from again ⇒ 他20年前去了海外,至今杳无音信。 Tā èrshí nián qián qùle hǎiwài, zhìjīn yǎo wú yīnxìn. → He went overseas twenty years ago, and he hasn't been heard of since.