sickle, scythe, trick
鎌 centers on a curved blade for cutting: a sickle or scythe. The 'trick' meaning is a rare, possibly archaic extension, but the core idea is the farming tool.
鎌 combines 金 (metal) with 兼, which likely contributes the sound and possibly the idea of combining or holding, suggesting a metal tool used for gathering crops.
The left side is metal 金, and the right side 兼 looks like a hand holding a bundle of grain stalks. Picture a metal blade cutting the stalks: a sickle.
For レン, imagine a farmer using a sickle to cut a long row of grain, and the sound of the blade is a clean 'ren' as it slices through. Ren -> レン.
Kamakura (city)
sickle
scythe
sickle and chain (weapon)
case that something major happens; event of an emergency; when it comes to the crunch
two sickles used in Okinawan Kobudo
sharp sickle
Peale's dolphin (Lagenorhynchus australis)
falx cerebri; cerebral falx
Atlantic white-sided dolphin (Lagenorhynchus acutus)
Shonan Kamakura University of Medical Sciences
dusky dolphin (Lagenorhynchus obscurus)
grass sickle
grass sickle
billhook
toothed sickle
tricking someone (into confirming or revealing the truth)
to trick someone (into confirming or revealing the truth); to ask a leading question
Battle of Kamakura (Genkō War; 1333); Siege of Kamakura
the five great Rinzai temples of Kamakura (Kenchō-ji, Engaku-ji, Jufuku-ji, Jōchi-ji, Jōmyō-ji)