English
photoactivity
Photoactivity comes from Latin āctīvitās ‘activity, movement, action’, from agō ‘to act, to behave’, and ultimately from Proto-Indo-European *h₂eǵ-.
- Proto-Indo-Europeanc. 4500–2500 BCE*h₂eǵ-reconstructed
- Proto-Indo-European, derivedc. 4500–2500 BCE*h₂éǵeti‘to be driving’reconstructed
- Proto-Italicc. 1500–700 BCE*agō‘to drive’reconstructed
- Latinc. 75 BCE–200 CEagō‘to act, to behave’
- Latin, derivedc. 75 BCE–200 CEāctīvus‘active’
- Latin, derivedc. 75 BCE–200 CEāctīvitās‘activity, movement, action’
- Middle Frenchc. 1400–1600activité
- English1500–presentactivity
- Englishtodayphotoactivity
attested reconstructed ? uncertain or disputed
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*h₂eǵ-reconstructed
- Proto-Indo-European, derivedc. 4500–2500 BCE*h₂éǵeti‘to be driving’reconstructed
- Proto-Italicc. 1500–700 BCE*agō‘to drive’reconstructed
- Latinc. 75 BCE–200 CEagō‘to act, to behave’
- Latin, derivedc. 75 BCE–200 CEāctīvus‘active’
- Latin, derivedc. 75 BCE–200 CEāctīvitās‘activity, movement, action’
- Middle Frenchc. 1400–1600activité
- English1500–presentactivity
- Englishtodayphotoactivity
Linked words
through Proto-Indo-European *h₂eǵ-
suggest, register, essay, gesture, acre, digest, congestion, agrarian, belligerent, progesterone, gestation, ingestion, ingest, agitate, axiomatic, agger, samaj, gerund, gestion, 128 more
through Proto-Indo-European *h₂éǵeti ‘to be driving’
strategy, agony, antagonist, axiom, reactionary, antagonism, agonist, antagonize, stratagem, glucagon, agonize, 102 more
through Proto-Italic *agō ‘to drive’
reaction, transaction, unambiguous, reagent, ambiguously, 80 more
through Latin agō ‘to act, to behave’
act, agency, action, agent, actual, agenda, actor, examine, examination, actively, ambiguous, squat, agile, assay, radioactive, ambiguity, enact, inactive, agility, agitation, cogent, actuator, retroactive, exigent, actuation, inexact, actuate, redact, 92 more
through Latin āctīvus ‘active’
active, activate, radium, 27 more
through English activity
Today it means
noun The condition of being photoactive
Language periods are conventional ranges, not dates for this word.
Etymograph / Proto-Indo-European *h₂eǵ- / photoactivity