insincerely
UK[ˌɪnsɪnˈsɪəli]US[ˌɪnsɪnˈsɪrli]
adv
In a way that is not honest, genuine, or truthful; with a pretence of feelings or beliefs one does not really have.
Morpheme Breakdown
in
sincere
ly
in
not
sincere
genuine
ly
adverb suffix
Etymology
The word 'insincerely' is built upon the core adjective 'sincere', which entered English from Latin 'sincerus', a term of debated origin but often interpreted as "clean, pure, or sound". The Latin prefix 'in-' is added to negate this core meaning, creating 'insincere' to describe a lack of genuineness or purity of intention. Finally, the native English adverbial suffix '-ly', descended from the Old English '-lice', is appended to form the adverb, describing the manner of acting without honesty or true feeling.
Analysis
Structure: in (not) + sincere (genuine) + ly (adverb suffix)
in: Latin origin, a prefix meaning "not" or "without".
sincere: Latin origin, from 'sincerus' meaning "clean, pure, genuine". Functions as the core adjective.
ly: Old English origin, a suffix forming adverbs from adjectives, indicating manner or quality.
Examples
He apologized insincerely, his eyes betraying his true annoyance.
The compliment was offered so insincerely that it felt more like an insult.
Politicians are often accused of speaking insincerely to win public favor.