A surname.

plural of Sifford

simple past tense and past participle of siffle

present participle of siffle

To carefully go through a set of objects, or a collection of information, in order to find something.

(biochemistry) A peptide that inhibits HIV fusion and replication

(transitive or intransitive) To whisper or to hiss softly.

(countable) supplication, petition, importuning, or wheedling

(transitive or intransitive) To supplicate, petition, importune, or wheedle / (transitive or intransitive) To criticise / (transitive or intransitive) To suggest

(archaic) third-person singular simple present indicative form of sift