I. man ‧ i ‧ fold 1 /ˈmænəfəʊld, ˈmænɪfəʊld $ -foʊld/ BrE AmE adjective formal
[ Language: Old English ; Origin: manigfeald ]
many and of different kinds:
The reasons for this situation are manifold.
II. manifold 2 BrE AmE noun [countable] technical
an arrangement of pipes through which gases enter or leave a car engine