[narf poit chez BOOM]

'DUCK!' does indeed rely on context. it means on thing on a duck hunt and quite another pretty much anywhere else, unless not spoken with alarm, in which case, it's meaning is partly that of it's meaning on a duck hunt, without the intent to shoot the duck.

'STOP!', while tending to indicate a clear desire to desist, depends on it's context to determine what is to be stopped.

'enter.' can mean to enter a dwelling, input something on a computer, or a key normally used in the process of doing so.

'hello.' tends to be a greeting, but is dependent on context to determine who it is being spoken to and some other facter's, such as tone of voice, determine how warm a greeting it is, what type of greeting it is and wether the person would like to stay and talk.

'goodbye.' tends to be a farewell, but is dependent on context and tone of voice to determine how long the farewell is to Last, wether it is permanent or not and wether there are warm feelings or not.

my theory still holds.