当然 (とうぜん)natural; right; proper

natural; right; propernouns which may take the genitive case particle 'no', adjectival nouns or quasi-adjectives (keiyodoshi)
naturally; as a matter of course; rightlyadverb (fukushi)

当然, its kanji, and other words that share them.Open this graph

Kanji in 当然

当初とうしょbeginning; start
当局とうきょくauthorities; relevant authorities
当時とうじat that time; in those days
当選とうせんbeing elected
当面とうめんcurrent; urgent
担当たんとうbeing in charge (of an area of responsibility); being responsible (for a work role, etc.)
本当ほんとうtruth; reality
担当者たんとうしゃperson in charge (of an area of work); person responsible
自然しぜんnature
依然いぜんstill; as yet
依然としていぜんとしてstill; as yet
天然てんねんnature; spontaneity
突然とつぜんabrupt; sudden
天然ガスてんねんガスnatural gas
不自然ふしぜんunnatural; artificial
偶然ぐうぜんcoincidence; chance

See how 当然 connects to the rest of Japanese.