The only free and comprehensive online etymological dictionary of the Spanish language
intentar (Verb) "to try"
From Latin intentar "to extend toward," from intendere "to focus on," "to strain" (see entender) and frequentive suffix -tare (see note under faltar).
Indo-European
Romance
Asturian entender, Portuguese intender, Catalan entendre, French entendre, Italian intendere, Aromanian ntindu, Romanian întinde, Sardinian intèndhere