The discussion went on till late at night.
Tōron wa yoru osoku made tsuzuita.
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
slow; late (e.g. "late at night"); too late; dull; stupid
until (a time); till; to; up to; to (a place); as far as; to (an extent); up to; so far as; even; only; merely
to continue; to last; to go on; to continue (without a break); to be unbroken; to occur again and again; to lead to; to connect to; to adjoin; to come after; to follow; to succeed; to rank next to; to hold out; to keep; to last
Readings: トウ、 う.つ
Meanings: chastise, attack, defeat, destroy, conquer
Meanings: argument, discourse
Readings: ヤ、 よ、 よる
Meanings: night, evening
Readings: チ、 おく.れる、 おく.らす、 おそ.い
Meanings: slow, late, back, later
Readings: ゾク、 ショク、 コウ、 キョウ、 つづ.く、 つづ.ける、 つぐ.ない
Meanings: continue, series, sequel