講師は本題から脱線してしまった。
Sentence Analyzer
English Translation
The speaker wandered away from the subject.
Furigana
Romanji
Kōshi wa hondai kara dassenshiteshimatta.
Words
講師
(こうし)
lecturer
は
(は)
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
本題
(ほんだい)
main question; real issue at hand
から
(から)
from (e.g. time, place, numerical quantity); since; from (originator); by; because; since; out of (constituent, part); through (e.g. window, vestibule); after; since
脱線
(だっせん)
derailment; digression; deviation
Kanji
Reading: コウ
Meanings: lecture, club, association
Readings: シ、 いくさ
Meanings: expert, teacher, master, model, exemplar, army (incl. counter), war
Readings: ホン、 もと
Meanings: book, present, main, origin, true, real, counter for long cylindrical things
Reading: ダイ
Meanings: topic, subject
Readings: ダツ、 ぬ.ぐ、 ぬ.げる
Meanings: undress, removing, escape from, get rid of, be left out, take off
Readings: セン、 すじ
Meanings: line, track