Picnicked
Origin
picnic + -k- + -ed – the -k- is so that the ‘c’ is pronounced as a /k/ (hard ‘c’), rather than as an /s/ (soft ‘c’).
Verb
picnickedpicnicked
(past of picnic)
picnic + -k- + -ed – the -k- is so that the ‘c’ is pronounced as a /k/ (hard ‘c’), rather than as an /s/ (soft ‘c’).