Chardal
Chardal (or Hardal; Hebrew: חרד"ל, acronym for חרדי לאומי, Charedi Le-umi, lit. "Nationalist Charedi", plural Chardalim) usually refers to the portion of the Religious Zionist Jewish community in Israel which inclines significantly toward Charedi ideology (whether in terms of outlook on the secular world, or is their stringent (machmir) approach to Halacha); however it is sometimes used to refer to the portion of the Charedi Jewish community in Israel which inclines significantly toward Religious Zionist ideology.
Literal meaning
Chardal is an initialism of the words Charedi and Leumi. The acronym is easily remembered by Hebrew speakers since it is the same as the Hebrew word for mustard.
History and groups
The term Chardal is part of a broad process of certain groups of Religious Zionist youth becoming more strict in certain religious observances and more ideologically driven by the thought of Rabbi Zvi Yehudah Kook. In the late 1970s, graduates of Yeshivat Merkaz Harav began to reject certain aspects of the Religious Zionist and Bnei Akiva lifestyle. At that time, some of the graduates were already referred to as "plain-clothes Haredim."