The UI representation in xml

activity_main.xml

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@drawable/bg_gradient"
  tools:context=".MainActivity">

  <androidx.cardview.widget.CardView
    android:id="@+id/rvSentenceCard"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_margin="16dp"
    app:cardBackgroundColor="@android:color/transparent"
    app:cardCornerRadius="8dp"
    app:cardElevation="0dp"
    app:layout_constraintBottom_toTopOf="@id/rvWords"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHeight_percent="0.5"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <androidx.recyclerview.widget.RecyclerView
      android:id="@+id/rvSentence"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:overScrollMode="never" />
  </androidx.cardview.widget.CardView>

  <androidx.recyclerview.widget.RecyclerView
    android:id="@+id/rvWords"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:clipToPadding="false"
    android:overScrollMode="never"
    android:padding="16dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHeight_percent="0.5"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@id/rvSentenceCard" />
</androidx.constraintlayout.widget.ConstraintLayout>