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本格的

full-scale, full-fledged, serious, authentic

h õ̞ ŋ k a̠ k ɯ̟ t e̞ kʲ i → 本格的だ
本 book + 格 status or qualification + 的 -ic; having the nature of
adjective Rare #43,741
full-scale, full-fledged, serious, authentic Often describes something done or happening in earnest, or something professional or genuine.
JA: 本格的な料理を作ってみたい。
EN: I want to try making an authentic dish.

本格的な結界が張ってある

A powerful barrier has been set up.

— 崖の上のポニョ (2008)

失礼ですがかつてあなたは本格的な作家？

If you don't mind my asking, were you once a professional writer?

— 甘い生活 (1960)

それから本格的な掃除を始めた。

Then I started cleaning in earnest.

本格的に雨が降り出した。

The rain really started coming down.