Structuralism analyzes underlying structures and relationships between units and rules that generate meaningful systems. Ferdinand de Saussure contributed key ideas to structuralism in linguistics, including that language uses a naming process where words associate with concepts. A linguistic sign combines a signifier (sound) and signified (concept). Signs take value from their relationships within the whole language system rather than individual word-concept pairs. Relations between linguistic units can be syntagmatic (linear combinations) or associative (mental groupings). Saussure's structuralism sees language as a systematic whole greater than parts defined through relational contrasts.