secondary stress

US /ˈsek.ən.der.i ˈstres/
UK /ˈsek.ən.der.i ˈstres/
"secondary stress" picture
1.

a stress that is weaker than primary stress but stronger than tertiary stress (or unstressed syllables)

:
In the word 'elevator', the secondary stress falls on the first syllable 'el'.
Linguists use special symbols to mark secondary stress in phonetic transcriptions.