Service
Old English (denoting religious devotion or a form of liturgy), from Old French servise or Latin servitium ‘slavery’, from servus ‘slave’. The early sense of the verb (mid 19th century) was ‘be of service to, provide with a service’.
wiktionary
From Middle English servise, from Old French servise (French service), from the verb servir, from Latin servitium (compare Portuguese serviço, Italian servizio, Norman sèrvice, Spanish servicio), from servus(“servant; serf; slave”), ultimately from Proto-Indo-European*ser-wo-s(“guardian”), possibly from *ser-(“watch over, protect”). Displaced native Old English þeġnung.
Properly, the tree that bears sorb fruit, from Middle English serves, plural of serve(“sorb apple, serviceberry”), from Old English syrfe, from Vulgar Latin *sorbea, from Latin sorbus(“service tree”). See sorb.
etymonline
service (n.1)
c. 1100, "celebration of public worship," from Old French servise "act of homage; servitude; service at table; Mass, church ceremony," from Latin servitium "slavery, condition of a slave, servitude," also "slaves collectively," from servus "slave" (see serve (v.)).
Meaning "act of serving, occupation of an attendant servant" is attested from c. 1200, as is that of "assistance, help; a helpful act." From c. 1300 as "provision of food; sequence of dishes served in a meal;" from late 14c. as "service at table, attendance during a meal." Meaning "the furniture of the table" (tea service, etc.) is from mid-15c.
Meanings "state of being bound to undertake tasks for someone or at someone's direction; labor performed or undertaken for another" are mid-13c. Sense of "service or employment in a court or administration" is from c. 1300, as is that of "military service (especially by a knight); employment as a soldier;" hence "the military as an occupation" (1706).
Also in Middle English "sexual intercourse, conjugal relations" (mid-15c.; service of Venus, or flesh's service). Service industry (as distinct from production) attested from 1938. A service station originally was a gas stop that also repaired cars.
service (v.)
1893, "to provide with service," from service (n.1). Meaning "perform work on" first recorded 1926. Related: Serviced; servicing.
service (n.2)
type of tree or berry, extended form of serve (perhaps via Middle English plural serves being taken as a singular), from Old English syrfe, Old French sorbe, both from Vulgar Latin *sorbea, from Latin sorbus (see sorb).
