I think they're starting to get suspicious.
Something about her smile made him suspicious.
She remained deeply suspicious of computers.
His voice grew slightly suspicious.
I have a naturally suspicious mind.
Voters are rightly suspicious of attempts to save money in the area of education.
They were somewhat suspicious about her past.
She was highly suspicious of his motives.
Parents have every right to be suspicious of what the experts tell them.
We have to carry on as usual or it would look suspicious.
I find it very suspicious that he left halfway through the morning.
Police are treating both fires as suspicious.
He was seen acting in a highly suspicious manner.
Inform the police immediately if you see anything suspicious.
to be /to feel/ suspicious of /about/ smb., smth. - относиться к кому-л., чему-л. с недоверием
to be suspicious of strangers - недоверчиво относиться к незнакомым
to be suspicious of smb.'s intentions [motives, promises] - не доверять чьим-л. намерениям [побуждениям, обещаниям]
to become suspicious - а) заподозрить (что-л.); I became suspicious as soon as I saw him there - как только я его там увидел, я заподозрил неладное; б) стать подозрительным; he became suspicious of all his neighbours - он стал с подозрением относиться ко всем своим соседям
suspicious character - тёмная личность
suspicious person - подозрительный человек
under suspicious circumstances - при подозрительных обстоятельствах
to look suspicious - выглядеть подозрительно
1. (of) подозрительный, недоверчивый
to be /to feel/ ~ of /about/ smb., smth. - относиться к кому-л., чему-л. с недоверием
to be ~ of strangers - недоверчиво относиться к незнакомым
to be ~ of smb.'s intentions {motives, promises} - не доверять чьим-л. намерениям {побуждениям, обещаниям}
to become ~ - а) заподозрить (что-л.); I became ~ as soon as I saw him there - как только я его там увидел, я заподозрил неладное; б) стать подозрительным; he became ~ of all his neighbours - он стал с подозрением относиться ко всем своим соседям
2. вызывающий подозрение, подозрительный
~ character - тёмная личность
~ person - подозрительный человек
under ~ circumstances - при подозрительных обстоятельствах
to look ~ - выглядеть подозрительно