The Basque/Euskara word senbe
Word senbe
Meaning son

Comments
Possibly bimorphemic

Other words that might be of interest
izeba ‘aunt’, aNaia ‘brother’, neba ‘brother’, unbe ‘child’, [h]aur ‘child’, aLaba ‘daughter’, eRain ‘daughter-in-law’, aita ‘father’, neska ‘girl’, seNar ‘husband’, gizon ‘man’, ama ‘mother’, iLoba ‘nephew, niece, grandchild’, zurtz ‘orphan’, aReba ‘sister’, anizpa ‘sister’, osaba ‘uncle’