Proto-IE: *lōbh-
Meaning: to fortify (oneself), to rest
Old Greek: lōpháō `sich erhohlen, ausruhen, nachlassen', tr. `erquicken, befreien', lō̂phar = lṓphēma Hsch.
Russ. meaning: подкреплять силы, отдыхать
References: WP II 442 f (differently in Pok.)