Word origin
 [1835–45; ‹ NL ‹ Gk 
synécheia continuity, coherence, equiv. to 
syneche-, s. of 
syneche᷄s (adj.) holding together (
syn- syn- + 
ech(
ein) to hold + 
-ēs adj. suffix) + 
-ia -ia]This word is first recorded in the period 1835–45. Other words that entered Englishat around the same time include: communism, ecumenical, hot plate, serial, squeegee-ia is a noun suffix having restricted application in various fields, as in names ofdiseases (malaria; anemia), place names (Italia; Romania), names of Roman feasts (Lupercalia), Latin or Latinizing plurals (Amphibia; insignia; Reptilia), and in other loanwords from Latin (militia)