誠に

まことに · makotoni · JLPT N1 · adverb

indeed

誠 (sincerity) + に: truly sincere, so 'indeed' or 'really'. Polite intensifier, like a formal 'verily'.

誠 means sincerity or truth, and に turns it into an adverb. Use it in formal speech to mean 'truly' or 'absolutely'.

More Japanese words · How Japanese works