Holos is taken from Ancient Greek and is the root of the English word "Whole". Holos can be translated as "wholly", where all the parts are present and working as a whole – i.e. as the total, which is greater than the mere sum of the parts. Other translations and connotations include: "altogether" "entire" "complete," and even "safe and sound".
Holos captures the key principles of psychological health that I wish to promote, taking account of all aspects of a person's functioning, including their physical health and relationships, so that they can really be "more than the sum" of their parts.