Definitions

1. interjection

a polite or formal way of saying ‘I don’t know’ or expressing ignorance or uncertainty

“I couldn’t find the answer to the riddle, otoh.”

2. noun

a polite or formal way of saying ‘I don’t know’ or expressing ignorance or uncertainty

“My friend’s response to the question was a simple ‘otoh’.”

3. adverb

used to soften or mitigate the force of a statement, especially one expressing ignorance or uncertainty

“I’m not sure if it’s true, otoh, it sounds plausible.”