"to keep (a promise), to hold back, to restrain" is Сдержать in Russian.
Сдержать means "to keep (a promise), to hold back, to restrain" in English.
Listen to the pronunciationWord #3584 of 4,000 by frequency in Russian — level B2.
Он обещал помочь и сдержал своё слово.
He promised to help and kept his word.