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systémsystem
syselground squirrel, s(o)uslik
systematickysystematically, methodically
systematickýsystematic, methodical, (well-)planned
systematičnostsystematic nature/character
systematiksystematist
systematikataxonomy, classification
systematizacesystematization, systemization
systematizovatsystematize, systemize
systemizacesystemization
systemizovanýsystemized