Tense four terms in Sherborne suppressing Henry’s laugh (3-3)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

T (abbreviation for tense, in grammar), then the last letter (term = termination) of [sherborn] E four times, containing (suppressing) H (abbreviation for henry = unit of electrical inductance). A representation of the sound of a certain kind of laugh.