起源・起原|きげんkigen[1]atamadaka (head-high)

1. nounorigin; beginning; source
   この民族みんぞくの起源きげんは神秘しんぴにつつまれている。↗

   The origins of these people is shrouded in mystery.

• Synonym根源こんげんWrittenWritten/formal prose. The root of something, especially the root cause of a problem, as in 「諸悪の根源」; 起源 focuses on when and where something first arose.
• Synonym源みなもとNeutralThe source of a river, also figuratively the wellspring of something, as in 「元気の源」; 起源 is the more academic, objective word.
• Synonym始まりはじまりNeutralThe start or beginning of something, common in everyday speech; 起源 specifically concerns a thing's origins and derivation.
• Synonym源流げんりゅうWrittenWritten/formal prose. The headwaters of a river, or the source from which a culture or tradition flows; 起源 stresses the very first emergence.
• Synonym起点きてんNeutralA starting point in space, time or a process, as in 「改革の起点」; 起源 is about where something comes from.
• Synonym発祥はっしょうNeutralWhere a culture or practice first arose, as in 「日本発祥の料理」; the birthplace is 「発祥の地」. 起源 is the more general term.
• SynonymルーツNeutralLoanword for one's roots or ancestry, used mostly about people; 起源 has a more academic feel.
• Synonym発端ほったんWrittenWritten/formal prose for the start or cause of an event; 起源 is about where a thing originates.
• Synonym起こりおこりNeutralThe cause or origin of a matter, as in 「事の起こり」; 起源 has a more academic tone.
• Synonym元始げんしWrittenWritten/formal prose for a primal, original beginning; rare — 起源 is the usual word.
• Synonym濫觴らんしょうWrittenWritten/formal prose with an elegant, classical flavor, for the very beginning of something; 起源 is more common.
• Synonym起首きしゅWrittenWritten/formal prose for the start or outset of something; rare — 起源 is more common.
• SynonymオリジンNeutralLoanword meaning origin; rare — 起源 is the usual choice.
• Synonym淵源えんげんWrittenWritten/formal prose for a deep, long-standing origin or connection; 起源 is the more objective word.
• Synonym根元ねもとNeutralThe same word as 根源, also written 「根原」「根元」; points to the root cause of something, while 起源 stresses when it first emerged.
• Related振り出しふりだしNeutralA starting point, seen mostly in 「振り出しに戻る」 (back to square one); 起源 is about where something comes from.
• RelatedはじめNeutralThe general word for the beginning or first part of something; 起源 specifically means where a thing comes from.
• Related幕開けまくあけNeutralRaising the curtain on something, mostly figurative for the dawn of an era; 起源 is about derivation.
• Related幕開きまくあきNeutralThe curtain rising on a play; figuratively the start of an era. 起源 is about origins and derivation.
• Related出だしでだしNeutralColloquial word for the opening or how something gets started; 起源 is about where it comes from.
• Related序開きじょびらきWrittenWritten/formal prose for the beginnings of something; rare — in everyday speech use 「始まり」 or 「起源」.
• Related初口しょくちWrittenWritten/formal prose for the very first steps of an activity; rare — say 「始め」 or 「始まり」 instead.

Use 「起源」 for where something first came from, as in 「生命の起源」. For the root cause of a problem say 「根源」; for where a culture or practice arose say 「発祥」, its birthplace being 「発祥の地」; for a river's source say 「源」 or 「源流」; for the start of an event say 「発端」. For plain beginnings use 「始まり」 or 「始め」; 「ルーツ」 is for people's roots. 「元始」, 「濫觴」, 「起首」, 「序開き」 and 「初口」 are rare literary alternatives.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 物事ものごとの起おこり。物事ものごとの始はじまり。
2. 物事ものごとが始はじまる。