1. (adverb) in minute detail

• minutely

2. (adverb) without advance planning

• accidentally
• by chance
• unexpectedly

1. (adverb) without advance planning

• advisedly
• by choice
• by design
• deliberately
• designedly
• intentionally
• on purpose
• purposely

1. (adverb) in minute detail

• circumstantial
• infinitesimal
• minute

2. (adverb) without advance planning

• unexpected