na-adjective
forceful; coercive; high-handed
Describes an action or attitude that pushes through regardless of others' opinions or circumstances. Often used for policies, decisions, or methods that are imposed without consensus.
その強行的なやり方には反対だ。
I oppose that forceful way of doing things.
社長は強行的に改革を進めた。
The president pushed through the reforms in a high-handed manner.
強硬 means 'hardline' or 'tough', often used for stances or policies. 強行的 focuses on the forceful implementation of actions.
Compound of 強行 (きょうこう, 'forceful execution') + 的 (てき, '-like, -ish'). The exact historical derivation is uncertain, but the word follows a common pattern for forming adjectival nouns from Sino-Japanese nouns.