This is the 7028th most frequent Japanese word.
モチロン
Certainly!
The word "モチロン" here emphasizes agreement and willingness to help, implying the action is certain or expected.
モチロン、君を助けるよ。
Of course, I will help you.
In this sentence, "モチロン" is used to strongly affirm the statement, adding confidence to the assertion.
この映画はモチロン見る価値がある。
This movie is certainly worth watching.
Here, "モチロン" functions to acknowledge an obvious fact before presenting an additional consideration or contrasting idea.