intense, violent, or vehement; describing extreme force, feeling, criticism, or conflict
彼は監督の批判に対して激烈な反論を行った。
He made a vehement rebuttal to the coach's criticism.
薬を使わないと激烈な痛みが続く。
Severe pain continues unless medication is used.
激烈な議論の末、結論が出た。
After intense debate, a conclusion was reached.