Similis in Latin is a adjective meaning Like or Similar
Similis, velut.
Non est ei similis is Latin for "He/she/it is not like him/her/it". It's impossible to know who or what is being referred to without knowing the context.
A english word that has the root word similis is similar
Similis igni.
Similis omnibus.
Comes from the word similis meaning like
Pulchritudo feminae formosae similis musicae est.
Ave! duci novo, similis duci seneci
Suillia similis was created in 1838.
Ancylosis similis was created in 1987.
Callipogon similis was created in 1894.
Callinectes similis was created in 1966.