herzlos
Herzlos is a German adjective formed from Herz (heart) and the suffix -los (without), literally meaning "without heart." It is used both literally and figuratively to describe persons, actions, or attitudes perceived as lacking compassion, empathy, warmth, or moral consideration. As an adverb it can describe how someone acts (e.g., "er handelte herzlos"), and the related noun Herzlosigkeit denotes the quality of being heartless.
In everyday language herzlos carries a strongly negative moral judgment and is applied in personal contexts
While commonly used in moral and cultural discourse, herzlos is not a clinical term; mental-health professionals
Usage involves standard German adjective inflection and can be intensified or softened with modifiers. Because it