What is another word for undetectably?
Pronunciation: [ˌʌndɪtˈɛktəblɪ] (IPA) 
Undetectably means that something is unable to be noticed or discovered. There are several synonyms for the word undetectably, including invisibly, imperceptibly, subtly, inconspicuously, and unnoticeably. Invisibly means that something is completely hidden from view, while imperceptibly means it is unable to be perceived by the senses. Something that is subtly undetectable is difficult to notice but still exists. Inconspicuously means that it is not noticeable or attracts attention, while unnoticeably means that it cannot be noticed or perceived. These synonyms can be helpful in conveying the notion of something being so low-key that it is difficult to detect.
