Suspicious fire to the stars, the sun west suspicious, suspicious of truth does not, but I love not suspicious.

可疑星星为火，可疑太阳西移，可疑真理不存，惟我爱不可疑。

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Police are not treating the fire as suspicious.

警方认为这场火灾没有可疑之处。

《牛津词典》

The fire is of suspicious origin.

这场火灾起因可疑。

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He said fire investigators had found a suspicious seat of fire near the lounge window at the back of the house, and smoke patterns suggested the windows were open when the fire broke out.

BBC: Fernhurst victim attacked before house fire

Investigators said there was a "suspicious seat of fire" near a window in the lounge at the rear of the house.

BBC: Fernhust fire death prompts murder investigation

At first the adjusters were understandably suspicious about the fire.

FORBES: Magazine Article