probing [probings]+◼◼◼noun[UK: ˈprəʊb.ɪŋ] [US: ˈproʊb.ɪŋ]
sounding (out)+noun
breath test [breath tests]+◼◻◻noun[UK: breθ ˈtest] [US: ˈbreθ ˈtest]
echolocation [echolocations]+noun[UK: ˌekoloˈk.eɪ.ʃən] [US: ˌekoloˈk.eɪ.ʃən]
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