synchronic
Linguistics term describing analysis of a language at a single point in time, as opposed to historical development. Often contrasted with 通時的 (diachronic).
See also: 通時的
Analyze the grammar of modern Japanese from a synchronic perspective.
From 共時 (synchronicity) + 的 (-like, adjectival suffix). The term is a calque from Western linguistics, likely coined in the early 20th century.