What is this word in a sample of blackletter script?
This is Matthew 13:31
... put before them, and said: “The kingdom of heaven is like a mustard seed that a man took and sowed in his field. Which is the least of all seeds but when it is grown...”
The quoted script appears to be from Wycliffe's Bible of 1395, which is online via Studylight.org:
Another parable Jhesus puttide forth to hem, and seide, The kyngdom of heuenes is lijk to a corn of seneuey, which a man took, and sewe in his feeld.
They have (in modern letters) senevey which can be found in OED as senvy:
Obsolete.
- The mustard plant: see ᴍᴜsᴛᴀʀᴅ n. 2.
Etymology: < Old French senevé, also -vei, -vel, -vil (modern French sénevé) < popular Latin *sināpātium, < sināpi mustard.