Formभूतकृदन्त (past passive participle/क्त) from √द्रु ‘to run’; नञ्-निषेधार्थ (negative with अनु- here as preverb sense ‘after’/‘along’ + ‘not run’ in context ‘not chased’), तृतीया-विभक्ति (Instrumental/3rd), बहुवचन (plural), पुल्लिङ्ग/नपुंसकलिङ्ग (m/n)