Breathing, as the essential force of our lives, is expressed in Baltic and Slavic languages by lexemes often etymologically or semantically linked to words for "soul". Both Lithuanian and Latvian languages have a larger amount of denotations for soul, and in their etymological nests, especially with respect to common Baltic-Slavic tradition, we can search for those that could also include the meaning of "breath, breathing".
By analysing the existing etymological findings from a semantic point of view, i.e. using a broader range of language and folklore material, the paper identifies lexemes with mythological connotations, which are related to the breath in a semantic sense (soul) but also in an etymological sense (spirit, dvēsele, dūšia).