(organic chemistry) aldehyde

to be poisoned / (chemistry) to be poisoned (undergo inhibition of catalytic behavior)

scratching the head / ornamental hairpin

to scratch the head

being poisoned; poisoning / (chemistry) poisoning (inhibition of catalytic behavior)

(government, politics, uncommon) president / (government, politics) generalissimo / (historical) Führer - Adolf Hitler when the chancellor of Nazi Germany

double headed

cruel / severe, terrible / very bad, terrible

nonsense / meaninglessness

meaningless