Archaic interrogative adverb meaning 'how' or 'in what way'. Found in classical Japanese texts; not used in modern conversation.
In an old tale, it says, 'How can you think so?'
Archaic kanji spelling for the interrogative adverb いかで. Rarely used in modern Japanese.
Kana spelling of the archaic adverb. This is the most practical form for modern learners.
Alternate archaic kanji spelling. Also rare.
Developed from classical いかにて, composed of いかに “how” and the particle て; intervocalic voicing produced いかにで, which contracted to いかで. The spelling 争で is ateji.