noun
good start; strong start
Used for a favorable beginning in sports, business, projects, or other endeavors. Often appears in news or commentary contexts.
新チームは好発進を切った。
The new team got off to a good start.
今期の売上は好発進だ。
This quarter's sales are off to a strong start.
Compound of 好 (good) and 発進 (start, departure). The exact historical derivation is uncertain, but the word follows a common pattern of combining 好 with a noun to mean 'good X'.