Select the option that can be used as a one-word substitute for the given group of words.

So delicate or precise as to be difficult to analyse or describe

Subtle

The word that can be used as a one-word substitute for "so delicate or precise as to be difficult to analyse or describe" is subtle.

• Suitable means fitting or appropriate for a particular purpose.
• Subtle means delicate or precise in a way that is not immediately obvious or easily understood.
• Complex means consisting of many different parts or elements that are interrelated.
• Anagram is a word or phrase formed by rearranging the letters of another word or phrase.

Subtle is the most appropriate word for the given group of words because it specifically refers to something that is difficult to analyze or describe because of its delicate or precise nature. It is derived from the Latin word subtilis, meaning "finely woven."