According to Wiktionary "taratibu" would be an adverb:

carefully (with care)

(It would also be "gently")

From Wiktionary: https://en.wiktionary.org/wiki/taratibu

I believe "taratibu" and "pole" can often be interchanged, where "taratibu" has more the meaning of orderly or composed and "pole" the meaning of calm or careful.

Thanks. That is helpful. I would have used upole normally but I can see how the sense can be extended.