lourde

In a sentence

• Cette boîte est trop lourde pour moi à porter.

  This box is too heavy for me to carry.

  Here, 'lourde' is used as an adjective to describe the physical weight of the box.

• La conversation était lourde et difficile à suivre.

  The conversation was heavy and difficult to follow.

  In this case, 'lourde' describes the metaphorical weight or complexity of the conversation.

• Elle ressentit une lourde responsabilité après cette décision.

  She felt a heavy responsibility after this decision.

  Here, 'lourde' refers to the emotional weight or significance of the responsibility felt.