Proto-IE: *sap-, -e-
Meaning: to try, to research
Latin: sapiō, -ere, sapīvī/sapuī `schmecken, Geschmack haben; riechen; weise sein, einsichtig sein', sapor, -ōris m. `Geschmack, Leckerei, feiner Ton', nesapius `unwissend'
Other Italic: Osk sipus `sciens', Volsk sepu `sciente ?'
Celtic: OIr sāer `artifex'
Russ. meaning: пробовать, изучать внутреннее устройство
References: WP II 450 f