detect
Pronunciation: /dɪˈtɛkt/
verb
- discover or identify the presence or existence of: cancer may soon be detected in its earliest stages
- discern (something intangible or barely perceptible): Paul detected a faint note of weariness in his father’s voice
- discover or investigate (a crime or its perpetrators): the public can help the police to detect crime

Origin:
late Middle English: from Latin detect- 'uncovered', from the verb detegere, from de- (expressing reversal) + tegere 'to cover'. The original senses were 'uncover, expose' and 'give someone away', later 'expose the real or hidden nature of'; hence the current (partly influenced by detective)