ponderous

US /ˈpɑːn.dɚ.əs/
UK /ˈpɑːn.dɚ.əs/
"ponderous" picture
1.

lourd, pesant, lent

slow and clumsy because of great weight

:
The elephant's movements were surprisingly graceful despite its ponderous size.
Les mouvements de l'éléphant étaient étonnamment gracieux malgré sa taille lourde.
The old machine made a ponderous noise as it started up.
La vieille machine fit un bruit lourd en démarrant.
2.

ennuyeux, lourd, solennel

dull, laborious, or excessively solemn

:
The speaker's ponderous delivery put half the audience to sleep.
La prestation lourde de l'orateur a endormi la moitié de l'auditoire.
He wrote a ponderous academic paper on the subject.
Il a écrit un article académique lourd sur le sujet.