Description:

The term 'trop' has the base meaning of a literal heart and is the root word for centres, cores, and the emotion of love.

Historically, there were two words, 'trop' in the concrete gender that meant the heart as an organ or a centre or core, and 'trup' as an abstract gender as the emotion of love. However, when the gender system collapsed, this distinction was not preserved. The word 'trup' became disused, and the word 'trop' took over all of these meanings.

Noun:

As a noun, the base meaning of 'trop' is the heart as an organ, but it also has the meanings of 'centre' or 'core'. It also means the concept of love, or a specific love. If needed to disambiguate, the derived term 'tropysyn' more clearly denotes the emotion (and in fact words derived this way were always abstract in Old Common).

Verb:

As a verb, 'trop' is a semitransitive noxaj verb meaning to love passionately with an absolutive subject that is the lover and a dative indirect object that is the beloved. It behaves like a verb of desire. Trop is not sexual and is appropriate and common to use in non-sexual contexts. When used in a sexual context, it expresses the emotion that goes along with the sexual desire rather than the sexual desire itself.

The old meaning of trop as a verb was 'to centre', but that meaning has been pushed out by the emotional meaning inherited form 'trup'.