1. In an intrepid manner.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• intrepidty,
• untrepidly,
• jntrepidly,
• kntrepidly,
• ontrepidly,
• 9ntrepidly,
• 8ntrepidly,
• ibtrepidly,
• imtrepidly,
• ijtrepidly,
• ihtrepidly,
• inrrepidly,
• infrepidly,
• ingrepidly,
• inyrepidly,
• in6repidly,
• intrpidly,
• intrepidlyy,
• intermixdly,
• Inearrigly

• indirectly,
• intrepidity,
• intrepid,
• indriidae.

The adjective form of the word "intrepidly" is "intrepid".

The plural form of the word "intrepidly" is "intrepidlies." However, please note that "intrepidly" is an adverb, and adverbs generally do not have plural forms.

The singular form of "intrepidly" is "intrepidly". This word does not change in form between singular and plural.