un ‧ re ‧ serv ‧ ed ‧ ly /ˌʌnrɪˈzɜːvədli, ˌʌnrɪˈzɜːvɪdli $ -ɜːr-/ BrE AmE adverb
if you express a feeling or opinion unreservedly, you do it completely and without any doubts:
He apologized unreservedly.
un ‧ re ‧ serv ‧ ed ‧ ly /ˌʌnrɪˈzɜːvədli, ˌʌnrɪˈzɜːvɪdli $ -ɜːr-/ BrE AmE adverb
if you express a feeling or opinion unreservedly, you do it completely and without any doubts:
He apologized unreservedly.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012