Denshi Jisho — Online Japanese dictionary

過 か 1: surplus- (attaches to start of Sino-Japanese words); excess-; over-;
2: per- (chemical with more of a certain element than found in other compounds of the same constituents)
Prefix 
過去 かこ 1: the past; bygone days; the previous;
2: a past (i.e. a personal history one would prefer remained secret); one's past;
3: (Linguistic term) past (tense); preterit; preterite;
4: (Buddhist term) previous life
Common word, Adverbial noun, Noun 
過疎 かそ depopulation
Common word, Noun, No-adjective 
過多 かた excess; superabundance
Common word, Na-adjective, Noun 
過渡 かと 1: crossing; ferry;
2: transient;
3: changing old to new
Common word, Noun 
過度 かど excess; immoderation
Common word, Na-adjective, Noun, No-adjective 
過ぎ すぎ 1: past; after;
2: too (much); over (e.g. eating)
Common word, Noun, Noun suffix 
過誤 かご mistake; fault
Noun 
過激 かげき extreme; radical
Common word, Na-adjective, Noun 
過酷 かこく rigour; rigor; severity; cruelty; harsh
Common word, Na-adjective, Noun 
過言 かごん exaggeration; saying too much
Common word, Noun 
過失 かしつ 1: error; blunder; accident;
2: fault; defect
Common word, Noun 
過大 かだい excessive; too much; unreasonable
Common word, Na-adjective, Noun, No-adjective 
過程 かてい process; course; mechanism
Common word, Noun 
過当 かとう excessive; exorbitant
Common word, Na-adjective, Noun 
過熱 かねつ superheating; overheating
Common word, Noun, Suru verb 
過敏 かびん nervousness; oversensitivity
Common word, Na-adjective, Noun 
過密 かみつ overcrowding; crowded; congestion
Common word, Na-adjective, Noun, No-adjective 
過労 かろう overwork; strain
Common word, Noun, No-adjective 
過客 かかく traveller (passing through); traveler
Noun 
過雁 かがん flying goose
Noun 
過勤 かきん overwork
Noun 
過信 かしん trusting too much; overestimating ability
Noun, Suru verb 
過日 かじつ recently; the other day
Adverbial noun, Temporal noun 
過怠 かたい negligence; carelessness; mistake
Noun 
過半 かはん the greater part
Noun, No-adjective 
過般 かはん some time ago; recently
Adverbial noun, Temporal noun 

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