The Tur (Orech Chaim 670) writes that the word “Chanukah” is an acronym for the words “chanu chaf hei” – they rested on the 25th day (of Kislev).
The Rebbe of Radzvil zy”a (Ohr Yitzchok) explains this by quoting the pasuk (Bamidbor 6:23) that states: “This (koh) is how you should bless the children of Yisroel.” He explains the word “koh” by stating that a kohen represents chesed. When he blesses Klal Yisroel it should be done as an act of chesed, even if they aren’t worthy. Thus, the pasuk is saying that they should always bless Yidden “like this”, no matter who they are or whether they are worthy or not.
Accordingly, he explains the Tur to be saying that we celebrate Chanukah in commemoration of the miracle that occurred at this time. Therefore, Chanukah is an auspicious time. It is an auspicious time for the nation to be treated with compassion, even if we are not worthy. Thus, “chanu kah” – we rest with “this” – meaning with the middah of chesed, whether we are worthy of it or not.
