вводн. undoubtedly, without doubt/question
несомненн|о - undoubtedly, indisputably;
он, ~, придёт he`s sure to come;
~ость ж. certainty;
~ый undoubted, unmistakable, indisputable;
~ый успех an indisputable/indubitable success.
он, ~, придёт he`s sure to come;
~ость ж. certainty;
~ый undoubted, unmistakable, indisputable;
~ый успех an indisputable/indubitable success.
Большой англо-русский и русско-английский словарь. 2001.