Translation of "sembuse" into English

Singeweza hata kusimama, sembuse kupanda juu kama paa.

I couldn’t even stand up, let alone climb up like a stag.

Baada ya kujaribu kwa miaka mingi, utafiti wote wa kisayansi haujafunua kisababishi cha kuzeeka sembuse jinsi ya kuukomesha.

After decades of effort, scientific research has not revealed the cause of aging, much less found a cure.