弾む: a bouncing ball and a lively conversation
Read 弾む through a new ball and a shared hobby. Distinguish bouncing from a conversation becoming lively without assuming a bounce height, agreement on every opinion, or a romantic relationship.
A new ball that bounces well on the ground
弾む (はずむ) can describe a ball bouncing. 「新しいボールは地面でよく弾む。」 means “The new ball bounces well on the ground.” 新しいボール identifies what moves, and 地面で identifies where it bounces. よく弾む describes the ball's ability to bounce well.
The physical movement belongs to the ball, rather than to a conversation or a feeling. よく does not supply an exact height or number of bounces. The sentence describes a property in the present tense, not a measured report of one particular bounce.
A shared hobby makes the conversation lively
「共通の趣味が分かると二人の会話が弾んだ。」 means “Once they discovered a shared hobby, their conversation became lively.” The subject of 弾んだ is 二人の会話. Discovering the common hobby is the occasion after which the conversation gains energy.
会話が弾んだ describes lively conversation, not agreement on every opinion. Nor does it establish that the two people began a romantic relationship. The shared hobby helps explain the conversation's flow without defining the whole relationship between its participants.
Identify what moves or becomes lively
In the ball sentence, 地面 and ボール establish a physical bouncing scene. In the conversation sentence, 共通の趣味 provides the occasion and 会話 is what becomes lively. Finding the subject of 弾む helps distinguish movement on the ground from an animated exchange of words.
The tenses also differ: the ball has a stated bouncing property, while the conversation became lively after the shared hobby was discovered. Stay with those subjects and changes rather than turning the examples into instructions for a higher bounce or a judgment about how close the speakers are.
Does 「会話が弾んだ」 after discovering a shared hobby mean that the two people agreed on every opinion?
Show the answer and why
No. It means that their conversation became lively after they discovered the shared hobby. Complete agreement or a particular relationship between them is not stated.