underneath

1 underneath /ˌʌndɚˈniːθ/ preposition
1 underneath
/ˌʌndɚˈniːθ/
preposition
Britannica Dictionary definition of UNDERNEATH
1 
: below or beneath (something) : under
2 
: on the bottom of (something)
3 
: hidden below (an outward appearance)
2 underneath /ˌʌndɚˈniːθ/ adverb
2 underneath
/ˌʌndɚˈniːθ/
adverb
Britannica Dictionary definition of UNDERNEATH
1 
: below or beneath
2 
3 underneath /ˌʌndɚˈniːθ/ noun
3 underneath
/ˌʌndɚˈniːθ/
noun
Britannica Dictionary definition of UNDERNEATH

the underneath

chiefly British
: the bottom surface of something : underside